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Muscovite #1B.jpg (Author: Bruce Sevier)
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Muscovite #1C.jpg (Author: Bruce Sevier)
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Muscovite #1D.jpg (Author: Bruce Sevier)
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Muscovite #1E.jpg (Author: Bruce Sevier)
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Muscovite #1F.jpg (Author: Bruce Sevier)
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Muscovite #1G.jpg (Author: Bruce Sevier)
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Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite (variety fuchsite), Pyrite
Trabajos en carretera Pauna-San Pablo de Borbur (Mina de la Carretera), Municipio Pauna, Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
55x32x11mm (Autor: Fiebre Verde) -
Muscovite - Quartz
Suiza
60 mm x 40 mm x 30 mm (Autor: Dany Mabillard) -
Muscovite after Andalusite (variety pinite)
Valle Lüsens, Valle Sellrain, Distrito Innsbruck-Land, Tirol Norte, Tirol, Austria
8,5 x 7,5 cm (Autor: Volkmar Stingl) -
Muscovite after Tourmaline
Mina Sapo, Ferruginha, Conselheiro Pena, Vale do Rio Doce, Minas Gerais, Brasil
82 mm x 37 mm x 35 mm (Autor: Don Lum) -
Muscovite and Quartz
Minas da Panasqueira, Aldeia de São Francisco de Assis, Covilhã, Castelo Branco, Cova da Beira, Centro, Portugal
16 cm x 14 cm x 8 cm (Autor: silvia) -
Muscovite book specimen 1 (other side) (Author: Turbo)
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Muscovite book specimen 1: 12 cm in length, 2 cm thick, Wilmington, DE (Author: Turbo)
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Muscovite book specimen 2: 11 cm in length, 1 cm thick, Wilmington, DE (Author: Turbo)
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Muscovite ps. after tourmaline
Sapo Mine, Conselheiro Pena, Minas Gerais, Brazil
5.3 x 6.6 cm.
Intergrown books of silvery muscovite crystals replacing a tourmaline crystal. The trigonal tourmaline x-section is distinctly visible when viewed from the top. Collected in 2010. (Author: crosstimber)
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Muscovite, Albite (variety pericline)
Floitengrund, Valle Ziller (Zillertal), Tirol Norte, Tirol, Austria
3 x 2,5 cm (Autor: Volkmar Stingl)Muscovite, Albite (variety pericline)
Floitengrund, Valle Ziller (Zillertal), Tirol Norte, Tirol, -
Muscovite, Aquamarine
Chumar Bakhoor, Valle Hunza, Distrito Nagar, Gilgit-Baltistan (Áreas del Norte), Paquistán
Specimen size 13 cm, beryl crystal 2,5 x 3 cm, lar (Autor: Tobi) -
Muscovite, Quartz, Chlorite
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
121 x 72 mm (Autor: Sante Celiberti) -
Muscovite, Quartz, Chlorite
Canteras Beura, Beura-Cardezza, Valle Ossola, Provincia Verbano-Cusio-Ossola, Piamonte (Piemonte), Italia
121 x 72 mm (Autor: Sante Celiberti) -
Muscovite, Quartz
Keystone, Distrito Keystone, Condado Pennington, South Dakota, USA
64 mm x 61 mm x 54 mm (Autor: Don Lum) -
Muscovite, Siderite, Arsenopyrite, Marcasite
7.3 × 6.9 × 3.8 cm
(Author: Michael Shaw)
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Muscovite/Cassiterite combo, Mt Xuebaoding, China. (Author: Samuel)
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Muscovite:
Teofilo Otoni, Minas Gerais, Brazil
(2 1/4" x 2" x 1 1/2") (Author: Bruce Sevier)
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Muscovite
Pedrera Mas Sever, Massabè (Mas Ceber), Sils, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
5 cm width. (Autor: Joan R.) -
Muscovite
Sabsar, Valle Indo, Distrito Baltistán, Gilgit-Baltistan (Áreas del Norte), Paquistán
8.0 x 9.0 cm (Autor: crosstimber) -
Muscovite
Cantera Nello Teer Crabtree Creek, Raleigh, Condado Wake, North Carolina, USA
5.0 x 8.2 cm (Autor: crosstimber) -
Muscovite
Cantera Fillow, Branchville, Redding, Condado Fairfield, Connecticut, USA
4.0 x 6.0 cm (Autor: crosstimber) -
Muscovite
Hiddenite, Condado Alexander, North Carolina, USA
1.9 x 2.0 cm (Autor: crosstimber) -
Muscovite
Floitengrund, Valle Ziller (Zillertal), Tirol Norte, Tirol, Austria
4,5 x 4,5 cm (Autor: Volkmar Stingl) -
Muscovite
Mina Reynolds, Springfield, Condado Sullivan, New Hampshire, USA
2.4 x 5.5 x 7.9 cm (Autor: Michael Shaw) -
Mushistonite on Kesterite on Cassiterite
Monte Xuebaoding, Pingwu, Prefectura Mianyang, Provincia Sichuan, China
73 x 50 x 40 mm (Autor: GneissWare)Mushistonite on Kesterite on Cassiterite
Monte Xuebaoding, Pingwu, Prefectura Mianyang, Provincia Sic -
Mushroom in a garden mason.JPG (Author: h.abbasi)
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Muzo (distrito minero), Cinturón Esmeraldífero Occidental, Departamento Boyacá, Colombia
(Autor: Fiebre Verde) -
My 8 cm Navidad Creedite - been looking for one for awhile and this stood out - bought at the 2011 Deming, NM show. (Author: Darren)
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My beloved little car in the distance. (Author: Pierre Joubert)
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My best find at this location was this crystal. Joe was there when I uncovered the fissure containing it. It was quickly apparent that something good was going to come out of this fissure when while extracting the quartz it suddenly became glassy. It was as if the quartz exploded into crystals in a zone within the fissure. The sunlight now directly overhead reflected shiny faces on the nearly black quartz as it lay half buried in the ground. I saw one edge of the crystal above and knew immediately it was going to be killer. After quickly brushing the dirt off and holding it up in the sun Joe and I stared in awe. "Damn!", Joe exclaimed. This was a huge burst of motivation for us. Exhausted and drenched in sweat in the burning sun we suddenly found a second wind knowing that the surrounding area must contain more goodies. Joe exemplified this by promptly finding another fissure six feet away in which he extracted two or three nice crystals and some facet grade smoky quartz material. (Author: Scott LaBorde)
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My best pocket, the one on the right, and the crystals found in it. (Author: John S. White)
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My camp site next to a small stream. (Author: Pierre Joubert)
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My camp site. (Author: Pierre Joubert)
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My candidate for the finest gypsum crystal to come out of Naica. This sits in an exhibit case in the mine office and is flawless (Author: Peter Megaw)
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My chum for scale. (Author: vic rzonca)
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My chum stands on the sandstone level that marks the bottom of the crystal bearing strata. The bathtub is thirty feet up from here. (Author: vic rzonca)
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My favorite chinese cinnabar 4,5cm (Author: parfaitelumiere)
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My favorite minaret quartz (Author: John S. White)
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My Favourite crystal a Petalite (not phenakite) from Mogok, measures 20 x 4mm (Author: nurbo)
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My final resting place before the last stretch; a steep descent. (Author: Pierre Joubert)
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My first amethyst
Unknown
3,5 x 3 cm. (Author: Anísio Cláudio)
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My first Fluorite. This octahedral Fluorite comes from Zarembo Island, which is near Wrangel, in Southeast Alaska. I had to go there one day, in 1980, to fix a broken helicopter and our customer, a geologist, gave me this piece. The crystals are very pale light green, practically colorless on drusy Quartz, and average 1/4" (6mm) the specimen is about 4" x 2 1/2" x 1 1/4" (10.1cm x 6.4cm x 3.2cm) (Author: Jim Prentiss)
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My first Malachite. I have to agree with Jordi on the sacredness of leaving a mineral in its natural form. This is not what I had ordered, the dealer was helping. Still it has the habit I am most enamored with, and kids think its pretty. It is 5" x 3 1/2 x 2" (12.7cm x 8.9cm x 5.1cm) (Author: Jim Prentiss)
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My little Red Cloud Mine toenail wulfenite. Like the one below, just came back to me in a trade with the guy I had sold it to, was glad to get it for $3 a few years ago!!! And am happy to have it back! (Author: Darren)
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My love for dogs in one picture: Me playing with some of the puppies from my parents’ last litter in 2017 (Author: Tobi)
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My mat cutter and workspace, the trusty ole kitchen counter. (Author: Gail)
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My small 4 cm Cavansite, bought from David Garske a few months ago. (Author: Darren)
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My whole back porch full of crystal and crystals plates..mostly smokey’s but some will be ammy’s and a few of the larger plates tend to have a light purple color in some of them (Author: Jason)
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Myargyrite
San Genaro Mine, Castrovirreyna District, Castrovirreyna Province, Huancavelica Department, Peru
3,5x3x1,5 cm
Well crystallized, gray metallic Myargyrite, associated with reddish Pyrargyrite, from a classic peruan Silver mine. (Author: Simone Citon)
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Mylonitized Calcite and Willemite
Franklin, New Jersey, USA
6x3 cm (Author: LennyL)
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Myself and Colin set off to climb Aiguille du Moine. The climbing is steep and airy, but relatively easy. Colin was refreshed by his luxurious night’s sleep in the hut and was way out in front - you can see him working his way leftwards along some sloping ledges. Actually I think at that point he waited for me ’cos a rope was required... (Author: Mike Wood)
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N’Chwaning Rhodochrosite (Author: Gail)
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N/A
(Author: Forrestblyth)
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NA
10cm
(Author: Forrestblyth)
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NA
(Author: Forrestblyth)
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NA
(Author: Forrestblyth)
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NA
(Author: Forrestblyth)
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NA
(Author: Forrestblyth)
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NA
Northumberland, Inglaterra / Reino Unido
(Autor: Forrestblyth) -
Nadorite
Langban, Värmland, Sweden
fov 2.5 mm (Author: Rewitzer Christian)
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Nagyagite
Sacarîmb ( Nagyág), Deva, Hunedoara Co., Romania
Up to 1 cm crystal cluster
Very rare "rose" of Nagyagite, associated with Rhodochrosite and Quartz, from old collection. (Author: Simone Citon)
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Nagyagite
Sacarîmb (Nagyág), Deva, Hunedoara Co., Romania
6x5x3 cm
Large sheets of Nagyagite in Rhodochrosite matrix, from old collection. (Author: Simone Citon)
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Nagyagite, Rhodochrosite
Sacarîmb (ex Nagyág), Deva, Hunedoara Co., Romania
7x6x4 cm
Exclusive, very rare and uncommon sample, with many complete, large (up to 2 cm ) Nagyagite crystals preserved by the encrusting Rhodochrosite and Quartz.
Usually large crystals of Nagyagite are broken, because it is very tender and fragile. From very old collection (late 1700-first 1800). (Author: Simone Citon)
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Naica Anidrite Chihuahua Mexico. size 11cm (Author: javmex2)
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Naica Chihuahua Mexico.
This piece is a group of calcite of 7.5 cm with spinel twinned fluorite crystals of 1cm some smaller and others larger, the largest measuring 1.5cm
Year:2007 (Author: javmex2)
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Naica fluorite.jpg (Author: Tracy)
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Mina Naica, Naica, Municipio Saucillo, Chihuahua, México
15 cm (Autor: Peter Megaw) -
Naica octahedron 10 cm on an axis (Author: Peter Megaw)
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Naica spinel twinned fluorite...with large enhydro. 8 cm across (Author: Peter Megaw)
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Naica trap mod.jpg (Author: Peter Megaw)
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naicfluo_angle90.jpg (Author: Tobi)
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Nakauriite
Lobminggraben, St Stefan ob Leoben, Leoben, Estiria/Steiermark, Austria
2,5 x 1,5 cm (Autor: Volkmar Stingl) -
Nambulite, Gypsum
Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
1.0 x 1.0 x 0.7 cm
ex Chris Stefano
Partial tabular pink-red translucent crystal of nambulite on gypsum. (Author: Don Lum)
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Nambulite, Gypsum
Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
1.0 x 1.0 x 0.7 cm
ex Chris Stefano
Partial tabular pink-red translucent crystal of nambulite on gypsum. (Author: Don Lum)
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Nambulite, Gypsum
Kombat Mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
1.0 x 1.0 x 0.7 cm
ex Chris Stefano
Partial tabular pink-red translucent crystal of nambulite on gypsum. (Author: Don Lum)
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Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57mm x 34mm x 24mm (Autor: Don Lum) -
Nambulite
Mina Kombat, Kombat, Distrito Grootfontein, Región Otjozondjupa, Namibia
57 mm x 34 mm x 24 mm (Autor: Don Lum) -
Namibia.jpg (Author: Tobi)
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Namibia.JPG (Author: Tobi)
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Narsarsukite
Island of Igdlutalik, Narsaq, South Greenland
FoV: 2,5 x 2 cm
GENERAL info about the mineral:
* Narsarsukite is a titanium containing chain silicate known currently from around 20 alkaline localities worldwide.
* General formula is Na2(Ti,Fe)Si4O11 - may contain F and OH
* Tetragonal crystal forms, mostly plates
* NOTE: Neptunite has almost identical formula but different crystal structure; it has monoclinic crystals.
* The type locality is Narsarsuk (xxx complex) from where the mineral was described by the Swedish mineralogist Flink in 19O1.
My previous photo of Narsarsukite from Ilímaussaq show a more typical aspect of the mineral, i.e. yellow plates.
The following is information about the PARTICULAR Igdlutalik Narsarsukite on this photo (source in the end):
The SITE :
* Igdlutalik is NOT inside, rather 12 km west of the Ilimaussaq complex. (and 45 km west of the type locality Narsarsuk)
* Narsarsukite occurs at the island within a dyke of peralkaline trachyte.
* The dyke was found during the 1 : 2o ooo reconnaissance mapping of the Julianehaab area by the Greenland Geological Survey.
* It is some 20 m wide and the outcrop can be traced not more than 50 m along the length of the dyke.
The CRYSTALS of Igdlutalik Narsarsukite:
* Short prisms (around twice as long as they are broad) unlike most narsarsukite from other locations that have tabular habits.
* Forms {1oo} and {oo1} are dominant
* The unique GREEN color here is probably due to aegirine inclusions. (the mineral itself is normally yellow)
COMPOSITION - particularities:
* The Igdlutalik narsarsukite has a distinctly high Ti/Fe ratio compared with those from Ilimaussaq and Narssarssuk; in this respect it most closely resembles the Sweet Grass, Montana narsarsukites (Stewart, 1959).
* Niobium is a significant minor component
FORMATION:
* All known occurrences of narsarsukite are in silica-oversaturated environments in close association with alkaline intrusive rocks that have crystallized at relative low pressures.
* Stewart (1959) pointed out that the requisite conditions for narsarsukite growth may be obtained where emanations from alkaline magmas react with siliceous wallrocks.
* Growth of narsarsukite, according to Stewart (I959), requires an excess of silica, high partial pressure of oxygen, and all abundance of Ti and Na. Stewart considered that at lower oxygen pressure neptunite, Na2FeTiSi4O12, would be generated. However, Rajasekaran (I966) demonstrated the apparently stable coexistence of narsarsukite and neptunite at St. Hilalre, Quebec.
SOURCE OF INFORMATION - most of the above is directly extracted from:
UPTON et. al. : Narsarsukite - a new occurrence in peralkaline trachyte, south Greenland
Mineralogical Magazine, Sept 1976, Vol. 40 PP. 737-46
www.minersoc.org/pages/Archive-MM/Volume_40/40-315-737.pdf
(giving all the references I have left in the above extracts)
on Mindat:
* Igdlutalik, the locality : http://www.mindat.org/loc-23311.html (by the way it is the type locality for Emeleusite)
* Narsarsukite crystals from the same dyke http://www.mindat.org/locentry-156911.html (Author: kakov)
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Narsarsukite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=5mm (Author: Doug)
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Narsarsukite, Manganoan Pectolite (black)
Kangerdluarsuk, Ilímaussaq Intrusive Complex, Narsaq, Greenland
FoV: 2,5 x 2 cm
GENERAL about the mineral:
* Narsarsukite is a titanium containing chain silicate known currently from around 20 alkaline localities worldwide.
* General formula is Na2(Ti,Fe)Si4O11 - may contain F and OH
* Tetragonal, seen mostly as tabular crystals, parallel to {oo1}.
* NOTE: Neptunite has almost identical formula but different crystal structure; it has monoclinic crystals.
* usually the color is YELLOW
* The type locality is the Narsarsuk pegmatite from where the mineral was described by the Swedish mineralogist Flink in 19O1.
Ilímaussaq Narsarsukite:
* First described from the Ilímaussaq complex by the Russian mineralogist Semenov in 1969
* Occurs in a quartz-bearing contact zone between naujaite and alkaline granite
* This environment is in accordance with:
* "Requisite conditions for narsarsukite growth may be obtained where emanations from alkaline magmas react with siliceous wallrocks" (Stewart (1959), quoted in UPTON et. al. 1977)
* The piece on this photo is from Kangerdluarsuk; where we are near the southern border of the Complex.
Turkestanite:
There are brown prisms (not very much darker than the narsarsukite) in the piece that is turkestanite (pointed out by a trustworthy source who had the piece in his hands). Not very well visible on this view, but there is the squared cross section of a crystal approx in the middle, above the left corner of the long narsarsukite plate. Other day I will try take and load close ups where it is better seen.
* "Ilimaussaq turkestanite forms up to a few millimeter large, brown or brownish-orange, idiomorphic, simple prismatic crystals; associated minerals are microcline, albite, augite, aegirine, quartz eudialyte and narsarsukite." (PETERSEN et.al 1999)
refs:
* STEWART 1959. Narsarsukite from Sage Creek, Sweet Grass Hills, Montana. Amer. Min. 44, 265-73.
(as quoted in: UPTON et. al. : Narsarsukite - a new occurrence in peralkaline trachyte, south Greenland - Mineralogical Magazine, Sept 1976, Vol. 40 PP. 737-46 www.minersoc.org/pages/Archive-MM/Volume_40/40-315-737.pdf)
* PETERSEN et.al: Turkestanite from the Ilímaussaq alkaline complex, South Greenland
Neues Jarhrbuch für Mineralogie - Monatshefte, issue: 9, 1999, pp: 424 - 432
(I did not manage to get the entire article, above sentence is quoted from the abstract) (Author: kakov)
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Natanite and rhodochrisite
Main Silicate Orebody, Potosi Mine, Santa Eulalia, Chihuahua, Mexico
FOV 1 cm
Cluster of 2 mm yellow-orange natanite crystals with rhodochrosite (Author: Peter Megaw)
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Native Copper (dodecahedral and wire copper)
Mina Osceola, Osceola, Condado Houghton, Michigan, USA
97 mm x 52 mm (Autor: Don Lum)Native Copper (dodecahedral and wire copper)
Mina Osceola, Osceola, Condado Houghton -
Native Copper (Spinel Twin, Cubic Crystals)
Mina Phoenix, Phoenix, Condado Keweenaw, Michigan, USA
22 mm x 18 mm (Autor: Don Lum)Native Copper (Spinel Twin, Cubic Crystals)
Mina Phoenix, Phoenix, Condado Keweenaw, -
Native Copper (variety spinel twin)
Mina Rocklands, Cloncurry, Distrito Cloncurry, Queensland, Australia
43 mm x 27 mm x 12 mm (Autor: Don Lum)Native Copper (variety spinel twin)
Mina Rocklands, Cloncurry, Distrito Cloncurry, Queensland, Aus -
Native Copper with Cuprite. Red Dome Mine, Chillagoe, Herberton District, Queensland, Australia. 10 x 8 x 6 cm. (Author: Samuel)
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Native Copper, Burra Burra Mine, Burra, Mt Lofty Ranges, South Australia, Australia.9 x 7 x 6 cm (Author: Samuel)
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Native Copper, Red Dome Mine, Chillagoe, Herberton District, Queensland, Australia. 10 x 5 x 2 cm. (Author: Samuel)
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Native Copper. Red Dome Mine, Chillagoe, Herberton District, Queensland, Australia. 6 x 4 x 4 cm. (Author: Samuel)
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Native Copper. Red Dome Mine, Chillagoe, Herberton District, Queensland, Australia. 6 x 4 x 4 cm. (Author: Samuel)
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Native Copper
Mina Milpillas, Cuitaca, Municipio Santa Cruz, Sonora, México
10 cm x 5 cm x 2 cm (Autor: silvia) -
Native Copper
Mina Milpillas, Cuitaca, Municipio Santa Cruz, Sonora, México
10 cm x 5 cm x 2 cm (Autor: silvia) -
Native Copper
Minas Ray, Zona Scott Mountain, Distrito Mineral Creek, Montes Dripping Spring, Condado Pinal, Arizona, USA
32 mm x 20 mm (Autor: Don Lum) -
Native Copper
Minas Ray, Zona Scott Mountain, Distrito Mineral Creek, Montes Dripping Spring, Condado Pinal, Arizona, USA
71 mm x 17 mm (Autor: Don Lum) -
Native Copper
Mina White Pine, White Pine, Condado Ontonagon, Michigan, USA
56 mm x 12 mm (Autor: Don Lum) -
Native Gold, Sphalerite, Quartz
Mina Timmins, Bristol, zona Timmins, Distrito Cochrane, Ontario, Canadá
26 mm x 15 mm x 15 mm (Autor: Don Lum) -
Native Gold
Mina Mockingbird, Zona Colorado, Distrito Whitlock, Mother Lode Belt, Condado Mariposa, California, USA
30 mm x 21 mm (Autor: Don Lum) -
Native Gold
Santa Elena de Uairén, Gran Sabana, Estado Bolívar, Venezuela
23 mm x 13 mm (Autor: Don Lum) -
Native Gold
Santa Elena de Uairén, Gran Sabana, Estado Bolívar, Venezuela
18 mm x 11 mm (Autor: Don Lum) -
Native Gold
Condado Placer, California, USA
22 mm x 20 mm x 15 mm (Autor: Don Lum) -
Native Gold
Tiglit, Provincia Assa-Zag, Región Guelmim-Oued Noun, Marruecos
9 mm x 5.5 mm (Autor: Don Lum) -
Native lead as flat balls with minor blue caledonite in quartz from Churfürst Ernst mine, Bönkhausen, Sauerland, Westphalia. Picture width 5 mm. (Author: Andreas Gerstenberg)
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Native platinum is quite rare in Germany. The picture shows a 1,8 mm nugget from Kolbersbach, Drachselsried, Bavaria. (Author: Andreas Gerstenberg)
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Native silver
Huantajalla mine, in the southeast of Uchucchacua area, Oyon, Lima, Peru
77 mm high x 45 mm wide (wire lenght >44 mm)
Close-up view (Author: Carles Millan)
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Native silver
Huantajalla mine, in the southeast of Uchucchacua area, Oyon, Lima, Peru
77 mm high x 45 mm wide (wire lenght >44 mm) (Author: Carles Millan)
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Native silver
Isle of Skye, Scotland
11mm across
This is the silver nugget I found in the stream, the first time I was there. Actually I haven’t had it tested yet, but it is so distinctive, it just has to be. Doesn’t it? (Author: Mike Wood)
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Native Silver
Pöhla-Tellerhäuser Mine, Pöhla, Schwarzenberg District, Erzgebirge, Saxony, Germany (Author: xdxucn)
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Native silver in and on Calcite with acanthite
3cm
Mexico. (Author: parfaitelumiere)
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Native Silver in Bornite
Coleman Mine, Levack, Ontario, Canada
12 x 4.5 x 3 cm
Native silver in bornite from Sudbury is typically formed in thin sheets along joint contacts within bornite veins. These high copper veins are found in the foot wall rocks away from the nickel ore bodies that are commonly mined here. (Author: Joseph D'Oliveira)
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Native Silver in Arsenic, Pöhla. Saxony, GER, Picture width is approx. 8 cm (Author: Montanpark)
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Native Silver on Arsenic
Pöhla - Erzgebirge
6.5 x 5 x 3.5 cm (Author: Joseph D'Oliveira)
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Native Silver on Arsenic
Pöhla - Erzgebirge
6.5 x 5 x 3.5 (Author: Joseph D'Oliveira)
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Native Silver on Calcite
Kongsberg Silver Mining District, Flesberg, Buskerud, Norway
5.7 x 2.9 x 2.2 cm
"The Cobra" (Author: Don Lum)
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Native Silver, Elizabeth Hill Mine, Near Karratha, West Pilbara, Western Australia, Australia. 11 x 6 x 3 cm (Author: Samuel)
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Native Silver, Imiter, Morocco, FOV approx. 3.5 cm (Author: Montanpark)
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Native Silver
Hi-Ho Mine, Cobalt, Ontario, Canada
12 x 8 x 1.5 cm
(Author: Joseph D'Oliveira)
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Native Silver
Mina Pöhla-Tellerhäuser, Pöhla, Distrito Schwarzenberg, Erzgebirgskreis, Sajonia/Sachsen, Alemania
42 mm x 38 mm (Autor: Don Lum) -
Native Silver
Condado Keweenaw, Michigan, USA
19.5 mm x 13 mm (Autor: Don Lum) -
Native Sulphur, El Desierto Mine, Cerro Picoloro, Daniel Campos Province, Potosi Department, Bolivia. S8, 10 x 7 x 7cm (Author: Samuel)
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Natrojarosite
Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
FOV = 2.0 mm (Autor: Doug) -
Natrolemoynite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4mm (Autor: Doug) -
Natrolite
Hohentwiel, Singen, Baden-Württemberg, Germany.
4 x 3 cm
Very well crystallized material from the type locality. (Author: Andreas Gerstenberg)
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Natrolite
Mont Saint-Hilaire, Monteregie, Quebec, Canada
5.6 x 6.9 cm.
Radiating groups of dull prismatic colorless natrolite associated with acicular black aegirine. The back side is covered with platy polylithionite pictured in the next photo. (Author: crosstimber)
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Natrolite
Oisgill Bay, Isle of Skye, Scotland, UK
10cm x 8cm x 4cm
Radiating aggregates of natrolite crystals. This was found in a gully around the corner at the north end of Oisgill Bay - on the map this spot is called ’An Ceannaich’. This specimen has been analysed. I went back to the same spot recently and could not find a trace of it; I think it had been buried by rockfall. My recollection is that the natrolite was formed in a vein in the back of the gully.
Self-collected 1995. (Author: Mike Wood)
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Natrolite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm (Author: Doug)
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Natrolite
San Agustin Del Valle Fertil, San Juan Prov., Argentina
4.6 x 7.6 x 10.2 cm.
Colorless acicular crystals of natrolite to 3.5 cm with reddish-brown iron oxide inclusions. Collected in Summer 2004. (Author: crosstimber)
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Natrolite
Sgurr nam Fiadh, Isle of Skye, Scotland, UK
8cm x 4cm x 3cm
Crystals of Natrolite found in a very large gas cavity in a weathered boulder. The greenish background (altered basalt) is distinctive and Prof. M.F.Heddle in his famous book ’Mineralogy of Scotland’ (1901) describes Scolecite from this locality on a similar coloured background. But this stuff is definitely Natrolite, it was tested via Alan Dyer in 2002. A mystery perhaps?
Self-collected 1994. (Author: Mike Wood)
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Natrolite
Yeola, Nasik District, Maharashtra, India
7.3 x 9.8 cm.
Divergent sprays of transparent prismatic natrolite associated with small pseudocubic crystals of apophyllite-(KF) on brown basalt. Recovered from a well dig in Sept. 2011. (Author: crosstimber)
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Natrolite (?) / Mesolite (?), Heulandite-Ca
Hvalfjörður, Reikiavik Norte, Islandia
29x48x26mm (Autor: Bergur_E_Sigurdarson)Natrolite (?) / Mesolite (?), Heulandite-Ca
Hvalfjörður, Reikiavik N -
Natrolite (?), Stilbite
Hvalfjörður, Reikiavik Norte, Islandia
63x38x34mm (Autor: Bergur_E_Sigurdarson) -
Natrolite + Analcime
Oisgill Bay, Isle of Skye, Scotland, UK
10mm crystals
Natrolite crystals to 10mm on small analcime crystals in a gas cavity in basalt lava. This material has been analysed.
Self-collected 2004. (Author: Mike Wood)
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Natrolite + Laumontite
Sgurr nam Fiadh, Isle of Skye, Scotland, UK
8 cm x 8 cm x 4 cm
Natrolite or mesolite crystals to 12 mm on white crystals that used to be laumontite, but have most likely dehydrated as the specimen has been stored dry. I have had similar material tested from this locality and it proved to be natrolite - courtesy of Alan Dyer - but not this same material.
This locality is 5km south of Talisker Bay and - you guessed it - very difficult to access !
Self-collected 2006.
Self-collected 2004. (Author: Mike Wood)
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Natrolite on Gmelinite, Little Deer Park Quarry,Glenarm, Co Antrim, Northern Ireland, FOV approx 10 x 7 mm (Author: nurbo)
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Natrolite on Gmelinite, Little Deer Park Quarry,Glenarm, Co Antrim, Northern Ireland, 30 x 20 mm (Author: nurbo)
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Natrolite subgroup
Vitiello Quarry (Cava Vitiello), Terzigno, Mt Vesuvius, Somma-Vesuvius Complex, Naples Province, Campania, Italy
10.39 mm area with several tufts of white Zeolite minerals (Author: Matteo_Chinellato)
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Natrolite, Analcime, Rhodochrosite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
40 mm x 30 mm 25 mm (Autor: Don Lum) -
Natrolite, Analcime
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
5,5 x 4,5 cm (Autor: Volkmar Stingl) -
Natrolite, Analcime
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
5,5 x 4,5 cm (Autor: Volkmar Stingl) -
Natrolite, Analcime
Dobrná, Děčín (Tetschen), Región Ústí, Bohemia, República Checa
FoV ca. 2 x 1,5 cm (Autor: Volkmar Stingl) -
Natrolite, Levyne
Cantera Beaver Valley, Shine, Condado Jefferson, Washington, USA
FOV = 3.7 mm (Autor: Doug) -
Natrolite, Tacharanite, Phillipsite
Palagonia, Northern Iblean plateau, Catania Province, Sicily, Italy
41.48 mm group with Natrolite balls and little white Tacharanite balls with Phillipsite (Author: Matteo_Chinellato)
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Natrolite.
Charcas, San Luis Potosí, México.
3cm x 3.3cm x 2.9cm. (Author: Luis Domínguez)
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Natrolite.
Flinder, Victoria, Australia.
50 x 25 mm (Author: nurbo)
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Natrolite.
Flinder, Victoria, Australia.
50 x 25 mm (Author: nurbo)
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Natrolite
Altavilla Quarry, Altavilla Vicentina, Vicenza Province, Veneto, Italy
Nicest 12.28 mm Natrolite ball (Author: Matteo_Chinellato)
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Natrolite
Altavilla Quarry, Altavilla Vicentina, Vicenza Province, Veneto, Italy
66 mm zone covered of Natrolite balls (Author: Matteo_Chinellato)
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Natrolite
Zona Imilchil, Anti-Atlas, Provincia Er Rachidia, Región Drâa-Tafilalet, Marruecos
37 mm (Autor: Gerhard Brandstetter) -
Natrolite
Distrito Jalgaon, Maharashtra, India
70mm x 50mm x 40mm (Autor: Philippe Durand) -
Natrolite
Cantera Weyerhaeuser Lincoln Creek, Colinas Doty, Condado Lewis, Washington, USA
5.5 x 8.0 x 9.6 cm (Autor: crosstimber) -
Natrolite
Monte Wind, Montes Cornudas, Condado Otero, New Mexico, USA
FOV = 3.5 mm (Autor: Doug) -
Natrolite
Cañón Tick, Lang, Condado Los Angeles, California, USA
FOV = 4.0 mm (Autor: Doug) -
Natrolite
Distrito Pune (Distrito Poonah), Maharashtra, India
fov 40 mm (Autor: ploum) -
Natrolite
Cantera Altavilla, Altavilla Vicentina, Provincia Vicenza, Veneto, Italia
24 x 22 mm (Autor: Sante Celiberti) -
Natrolite
Distrito Nashik (Nasik), Maharashtra, India
130 x 100 x 90 mm (Autor: Rob Schnerr) -
Natrolite
Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
70mm x 40mm x 45mm (Autor: Philippe Durand) -
Natrolite
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
127 x 90 mm (Autor: Sante Celiberti) -
Natrolite
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
127 x 90 mm (Autor: Sante Celiberti) -
Natrolite
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
5 x 3 cm (Autor: Volkmar Stingl) -
Natrolite
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
8 x 7 cm (Autor: Volkmar Stingl) -
Natrolite
Piz Sella, Plan de Gralba, Selva di Val Gardena, Provincia Trento, Trentino-Alto Adige (Trentino-Südtirol), Italia
8 x 7 cm (Autor: Volkmar Stingl) -
Natrolite
Hohentwiel, Singen, Konstanz, Freiburg, Baden-Württemberg, Alemania
5,5 x 2 cm (Autor: Volkmar Stingl) -
Natrolite
Fuerteventura, Provincia de Las Palmas, Canarias, España
7 x 3,5 cm (Autor: Volkmar Stingl) -
Natrolite
Fuerteventura, Provincia de Las Palmas, Canarias, España
7 x 3,5 cm (Autor: Volkmar Stingl) -
Natrolite
Lefka, Distrito Nicosia, Chipre
7.0 x 5.0 x 3.7 cm (Autor: Michael Shaw) -
Natrolite
Mariánská Skála, Región Ústí nad Labem, República Checa
5 x 4 cm (Autor: Volkmar Stingl) -
Natrolite
Mariánská Skála, Región Ústí nad Labem, República Checa
5 x 4 cm (Autor: Volkmar Stingl) -
Natrolite
Cantera Chimney Rock, Bridgewater, Condado Somerset, New Jersey, USA
11 x 1,7 cm (Autor: Sante Celiberti) -
Natrolite
Tighiste (Tirrhist), Zona Imilchil, Anti-Atlas, Provincia Er Rachidia, Región Drâa-Tafilalet, Marruecos
4,5 cm x 3,5 cm (Autor: Enrique Llorens) -
Natrolite
Tighiste (Tirrhist), Zona Imilchil, Anti-Atlas, Provincia Er Rachidia, Región Drâa-Tafilalet, Marruecos
6.5 x 4.0 cm (Autor: Michael Shaw) -
Natrolite
Zona Imilchil, Anti-Atlas, Provincia Er Rachidia, Región Drâa-Tafilalet, Marruecos
4 x 2,5 cm (Autor: Volkmar Stingl) -
Natrolite
Canteras Marrawah, Cabo Grim, Consejo Circular Head, Tasmania, Australia
6.1 x 4.6 x 2.1 cm (Autor: Michael Shaw) -
Natrolite
Pozo Robertson, Dayton, Condado Mason, Washington, USA
4.4 x 3.5 x 3.6 cm (Autor: Michael Shaw) -
Natrolite
Mina Wessels, Hotazel, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
7.1 x 6.5 x 4.5 cm (Autor: Michael Shaw) -
Natrolith (Hohentwiel).JPG (Author: Andreas Gerstenberg)
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Natropharmacoalumite
María Josefa Mine, Rodalquilar, Níjar, Almería, Andalucía, Spain
fov 2 mm (Author: Rewitzer Christian)
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Natropharmacoalumite
María Josefa Mine, Rodalquilar, Níjar, Almería, Andalucía, Spain
fov 2 mm (Author: Rewitzer Christian)
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Natropharmacoalumite
Mina María Josefa, Rodalquilar, Níjar, Comarca Metropolitana de Almería, Almería, Andalucía, España
fov 0.7 mm (Autor: Rewitzer Christian) -
Natropharmacoalumite
Mina María Josefa, Rodalquilar, Níjar, Comarca Metropolitana de Almería, Almería, Andalucía, España
fov 1 mm (Autor: Rewitzer Christian) -
Natropharmacoalumite
Mina María Josefa, Rodalquilar, Níjar, Comarca Metropolitana de Almería, Almería, Andalucía, España
fov 2.5 mm (Autor: Rewitzer Christian) -
Natropharmacosiderite
Mina Gold Hill, Gold Hill, Distrito Gold Hill, Condado Tooele, Utah, USA
FOV = 4.00 mm (Autor: Doug) -
Natrophosphate
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=2mm
Clear crystal (Author: Doug)
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Natropyrochlore
Volcán Água de Pau, Água de Pau, Municipio Lagoa, Isla San Miguel, Región Autónoma de las Azores, Portugal
fov 2 mm (Autor: ploum) -
Natropyrochlore
Volcán Água de Pau, Água de Pau, Municipio Lagoa, Isla San Miguel, Región Autónoma de las Azores, Portugal
fov 1.5 mm (Autor: ploum) -
Natropyrochlore
Volcán Água de Pau, Água de Pau, Municipio Lagoa, Isla San Miguel, Región Autónoma de las Azores, Portugal
fov 1.6 mm (Autor: ploum) -
Natrozippeite
Mina Widowmaker, Fry Mesa, Cañón White, Distrito White Canyon, Condado San Juan, Utah, USA
FOV = 2.5 mm (Autor: Doug) -
Natrozippeite
Grupo Mina Parco, Yellow Cat Mesa, Distrito Thompsons (S.E. Thompsons), Condado Grand, Utah, USA
FOV = 1.9 mm (Autor: Doug) -
Naturally etched, deep yellow color, heliodor crystal, from Padre Paraíso, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil
Size 122 x 13 x 9 mm (Author: olelukoe)
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Naturally etched, gem quality and fully completed topaz crystal floater , from old Ukraine locality - Volodarsk-Volinskiy, not so bad example from this old locality (usually topaz crystals from this place not so good quality)
Size 75 x 52 x 26 mm (Author: olelukoe)
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Naujakasite
Ilímaussaq Intrusive Complex, Narsaq, Greenland
FoV= 3 x 3 cm;
Crystal: 1.5 x 1.2 cm
NAUJAKASITE is by no means an aesthetic mineral but it is deeply exciting conceptually, let us see why:
This string begins with two pieces of Steenstrupine, a mineral found only few places and in low quantities outside the Ilímaussaq Intrusion. It has very complex structure and around 20 different elements in the full formula, many of which are rare ones.
The Naujakasite is similar in distribution, it is practically never found at all outside the Intrusion, even if inside it is locally very common, it reach to be the main component of a rock. But in opposition to Steentrupine, its formula is surprisingly simple: Na6(Fe,Mn)Al4Si8O26
Now, in case of “strange combination of weird elements” we somehow “intuitively” accept that the formation event has been a rare one with only one or very few known occurrences on Earth. Nevertheless seeing such a simple formula with few and common elements, the uniqueness of the Ilímaussaq formation is somehow even more striking.
Strongly simplified, apart from the presence of many rare elements we are talking about a magma with very low concentrations of silicium (quarz is never found in most of the area in the central parts of the Intrusion!) and very high concentrations of sodium (Na) – an element present in high amounts in many Ilímaussaq minerals. (no wonder Sodalite has its type locality here…) (Author: kakov)
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Naujakasite
Ilímaussaq Intrusive Complex, Narsaq, Greenland
FoV: 2,5 x 2 cm
A strange mineral that formed instead of nepheline in certain parts of the hyper-agpaitic magma (=low silica, high sodium) of the Ilímaussaq Intrusion. In spite of not containing any rare elements, it is practically not found anywhere else on Earth.
More info above my other Naujakasite photo that shows a single crystal. On this piece the colour is more fresh, greenish. (Author: kakov)
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Mina Ampliación a Victoria, Sierra de Alcarama, Navajún, Comarca Cervera, La Rioja, España
(Autor: supertxango) -
Nealite from Lavrion, Attica, Greece.
Field of view: 1.2 mm (Author: Rewitzer Christian)
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Nealite, Lavrion, Greece 1 mm (Author: Rewitzer Christian)
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Nealite
Mazarrón, Comarca Alto Guadalentín, Región de Murcia (Murcia), España
FOV 4.8 mm. (Autor: Rewitzer Christian) -
Nealite
Mazarrón, Comarca Alto Guadalentín, Región de Murcia (Murcia), España
FOV 3.8 mm. (Autor: Rewitzer Christian) -
Nealite
Mazarrón, Comarca Alto Guadalentín, Región de Murcia (Murcia), España
FOV 6 mm. (Autor: Rewitzer Christian) -
Nealite
Mazarrón, Comarca Alto Guadalentín, Región de Murcia (Murcia), España
FOV 1.2 mm. (Autor: Rewitzer Christian) -
Nearing the bottom where the vein starts to peter out..still finding druz here but no more large crystals. (Author: Jason)
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Nearly 5 cm long wires of so-called "Schlotsilber" (chimney silver) from Schlema mining district, Erzgebirge, Saxony. Not all dubious silver samples without matrix are manmade in a narrower sense. Some of them have been found when the chimneys of the smelters (f.e. at Freiberg and Schlema-Schneeberg district, Erzgebirge, Saxony) got pulled down. The silver sublimated on the inside of the chimneys. It is told that big chimney fragments fully overgrown by large silver wires have been found... But there´s nothing about ever been published and actually I never saw such "matrix chimney silver". Moreover you don´t see such loose wires that often; characteristic is their luster - the shown sample is, I think, 50 years old and there is no black tarnish on. (Author: Andreas Gerstenberg)
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Nearly home. Some 12 km from our home. (Author: Pierre Joubert)
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Neighborite and Rutile
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm
Rutile is dark crystal to right of neighborite (Author: Doug)
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Neil Prenn intent on digging quartz in a pocket. (Author: Tony L. Potucek)
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Nelson Streetcar (Author: Jimoore)
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Nenadkevichite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm (Author: Doug)
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Nenadkevichite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 2mm (Autor: Doug) -
Nenadkevichite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 2mm (Autor: Doug) -
Nenadkevichite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4mm (Autor: Doug) -
Nenthead mine workings. They do tours around the place. (Author: nurbo)
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Neotocite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4mm (Autor: Doug) -
Nephelina and Phlogopite
Auraghuq, Jurm, Valle Koksha, Distritos Khash & Kuran Wa Munjan, Provincia Badakhshan, Afganistán
20 mm x 20 mm (Autor: Manuel Mesa) -
Nepheline
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=4mm
Crude crystals on massive nepheline (Author: Doug)
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Nepheline (?), Aegirine
Ilímaussaq Intrusive Complex, Narsaq, Greenland
FoV: 5 x 4 cm
(side view of the piece on the previous photo)
Formation of Nepheline shows the lack of silicium in the magma.
It can be difficult to distinguish from feldspar, as it has similar colur and hardness, but it lack clear cleavage and has a somewhat greasy lustre - I am almost sure most of the gray substance we see here is nepheline. (in other areas of the same stone there is also a bit of feldspar, see previous pic) (Author: kakov)
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Nepheline on Lazurite
Auraghuq, Jurm, Valle Koksha, Distritos Khash & Kuran Wa Munjan, Provincia Badakhshan, Afganistán
20 mm x 20 mm (Autor: Manuel Mesa) -
Nepheline on Lazurite
Auraghuq, Jurm, Valle Koksha, Distritos Khash & Kuran Wa Munjan, Provincia Badakhshan, Afganistán
20 mm x 20 mm (Autor: Manuel Mesa) -
Nepheline
Löhley, Üdersdorf, Daun, Eifel, Renania-Palatinado/Rheinland-Pfalz, Alemania
48 x 26 x 11 mm (Autor: Rob Schnerr) -
Neptunite
Dallas Gem Mine, New Idria, Diablo Range, San Benito Co., California, USA
fov 35 mm (Author: ploum)
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Neptunite
Dallas Gem Mine, San Benito Co., California, USA
fov 45 mm (Author: ploum)
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Neptunite
San Benito Gem Mine, California, USA.
2cm across (Author: nurbo)
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Neptunite twin (Author: John S. White)
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Neptunite with Benitoite - Dallas Gem Mine - San Benito County - California - large minature (7.0 x 2.0 x 1.5 cm) (Author: jaysminerals)
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Neptunite, Benitoite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
3.6 x 3.0 cm (Autor: am mizunaka) -
Neptunite, Joaquinite-(Ce)
Benitoite Mine, New Idria District, Diablo Range, San Benito Co., California, USA (Author: Roger Warin)
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NEPTUNITE, Pyrochlore, Tugtupite
Ilímaussaq Intrusive Complex, Narsaq, Greenland
FoV: 4 x 5 cm (for reference you have the curvature of my finger on the top)
section of Neptunite crystal in right down corner: 3 x 3 mm
I have taken this piece for the relatively well developed Neptunite crystals (NB! this is not a micro photo), the Pyrochlore is more visible in the previous piece, here there are only small spots of it to the right of the central Neptunite area. The Tugtupite is also of very bad quality.
NEPTUNITE is a relatively common mineral in some rocks of the Ilímaussaq complex, among them the beryllium bearing hydrothermal veins. Hence if you have Tugtupite in your collection on a relatively decent sized matrix, it is highly probable you also will have Nepunite in it somewhere.
We are not talking about showy crystals like the well known wonders from San Benito, California, the grains/crystals here seldom get over a few mm and they are usually surrounded by other minerals. Nevertheless the Ilímaussaq Neptunite has some really interesting features, of which I would highlight:
1) It always shows the deep red colour.
2) Association: in the Tugtupite bearing hydrothermal veins the Neptunite grains are almost always directly associated with the niobium mineral Pyrochlore, that forms yellow or light brown irregular spots or oblong areas with a greasy lustre. Inside or near this substance we have dark grains, clearly deep red with a 10x loupe and often of romoidal shape – this is the Neptunite!
3) Cultural aspects: Although the type locality is not Ilímaussaq rather the Narsarsuk pegmatite located in the Igaliko intrusive complex, the two locations are relatively close to each other (and type locality Neptunite is practically impossible to get!). Furthermore we can say that the name given to the mineral is somehow equally justified at this site: In the Narsarsuk pegmatite there are big amounts of Aegirine, named after the sea god Aegir in the Nordic mythology – this association inspired the usage of “Neptun”, the Roman sea god in the nomenclature of the associated mineral. And well, Aegirine is also a common mineral in the Ilímaussaq complex… (Author: kakov)
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Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
3.3 x 6.2 cm (Autor: crosstimber) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
80 X 61 mm (Autor: Manuel Mesa) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
1.5 x 2.3 cm (Autor: crosstimber) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
91 x 63 mm (Autor: Sante Celiberti) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
91 x 63 mm (Autor: Sante Celiberti) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
fov 6.2 mm (Autor: ploum) -
Neptunite
Mina California State Gem (Benitoite Gem Mine), Zona San Benito River headwaters, Pico Santa Rita, Distrito New Idria, Condado San Benito, California, USA
fov 6.2 mm (Autor: ploum) -
Neustädtelite
Mina Alcantarilla, Encinilla Baja-Ventosilla, Belalcázar, Comarca Los Pedroches, Córdoba, Andalucía, España
FOV 0,9 mm (Autor: Rewitzer Christian) -
new DH 1.jpg (Author: Jason)
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