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Tetrahedrite
Unidad minera Pachapaqui, Pachapaqui, Distrito Aquia, Provincia Bolognesi, Departamento Ancash, Perú
70mm x 55mm x 24mm (Autor: Philippe Durand) -
Tetrahedrite
Cantera Usclas-du-Bosc, Le Bosc, Cantón Lodève, Distrito Lodève, Hérault, Occitanie, Francia
fov 6.0 mm (Autor: ploum) -
Tetrahedrite
Mina Keystone, Paso Coquihalla, División Nicola Mining, Columbia Británica, Canadá
(Autor: Doug) -
Tetrahedrite
Zona minera Cavnic, Cavnic, Maramures, Rumanía
17x16x4 cm (Autor: Joseph DOliveira) -
Tetrahedrite
Cantera Usclas-du-Bosc, Le Bosc, Cantón Lodève, Distrito Lodève, Hérault, Occitanie, Francia
fov 5.0 mm (Autor: ploum) -
Tetrahedrite
Zona minera Sankt Gertraudi, Brixlegg, Distrito Kufstein, Valle Inn, Tirol Norte, Tirol, Austria
10 mm diameter (Autor: Volkmar Stingl) -
Tetrahedrite
Mina Santa Rita, Distrito Morococha, Provincia Yauli, Departamento Junín, Perú
40 x 30 x 30 mm (Autor: Rob Schnerr) -
Thalenite-(Y), Tengerite-(Y)
Åskagens kvartsbrott, Värmland, Sweden
FoV: 3 x 3 cm
A silicate and a carbonate of Yttrium.
the site: http://www.mindat.org/loc-10006.html (Author: kakov)
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Tharandit (Tharandt).JPG (Author: Andreas Gerstenberg)
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Thaumasite
Alpe Bazena, Breno, Provincia Brescia, Lombardia, Italia
3,5 x 2 cm (Autor: Volkmar Stingl) -
The "Shipwreck" goethite pseudo/epimorphous after gypsum. Buena Tierra Mine, Level 2, West Camp, Santa Eulalia, Chihuahua, Mexico. 25 cm across. (Author: Peter Megaw)
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The "Tree" at home in our cabinet. (Author: Gail)
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The ’beach’ to the south of Talisker Bay, Isle of Skye, at low tide. Sep. 2010. (Author: Mike Wood)
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The 2 yellow arrows indicate where the 2 pockets are. The openings are not large enough to explore with your hands. (Author: Pierre Joubert)
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The 4x4 road up. (Author: Pierre Joubert)
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The above shown galena from Isaak Erbstolln, Halsbrücke, Freiberg district, Saxony after cleaning. Now the quartz matrix shows pale violet colour! The corroded crystal measures 2 x 1,5 cm. (Author: Andreas Gerstenberg)
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The Alien fluorites from Namibia. (Author: Gail)
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The analysis of the previous ones (related with the Pentahydroborites) re-confirmed also for the new ones
(Author: Jordi Fabre)
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The Angel’s Peak across the cloud inversion. A flock of 24 geese flying southward, honking occasionally. (Author: Mike Wood)
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The area has wonderful sandstone rock formations. (Author: Pierre Joubert)
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The area surrounding the quartz reef. (Author: Pierre Joubert)
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The area where I dug. (Author: Pierre Joubert)
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The area where I found the exposed pockets. (Author: Pierre Joubert)
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The area where I found the quartz with a black mineral. (Author: Pierre Joubert)
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The area where Riana dropped me off. (Author: Pierre Joubert)
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The arms are for scale. Albite and quartz. (Author: vic rzonca)
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The average size in this basket is 15 cm. (Author: vic rzonca)
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the back (Author: Jim)
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The back (Author: nurbo)
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The back of the specimen, primarily a limestone matrix with the yellow fluorite and white calcite covering one side. (Author: k-m.minerals)
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The back yard and more (Author: Glenn Rhein)
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The back: Matrix and schorl crystal.
Pakistan
6 x 4h cm (Author: Alessio Cenfi)
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The bane of the working stiff.
The time clock. (Author: vic rzonca)
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The base is a crystal of Calcite, a doubly terminated and twinned scalenohedron. A second generation of Calcite forming parallel groups of very bright crystals and with more complex forms has grown on it. The sample is crowned by a group of cubic crystals (Author: Joan Rosell)
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The beautiful, rare flowers that resembles a closed hand. (Author: Pierre Joubert)
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Pozo Berkeley, Butte, Distrito Butte, Condado Silver Bow, Montana, USA
(Autor: crosstimber) -
The best specimen I found. (Author: Pierre Joubert)
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The Book (Author: Lumaes)
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The border of the Western Cape, some 120 km from our home. The languages on the board are Afrikaans; Xhosa and (off-course) English. (Author: Pierre Joubert)
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The Cairngorms in early June this year. Still quite a lot of the winter’s snow about. On the plus side there were no midges. The mountain in the distance is called ’Cairngorm’, after which the range of mountains is named. It’s summit is 1244m, over 4,000 ft above sea level. Everywhere is granite. (Author: Mike Wood)
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The calcite on yellow fluorite. (Author: k-m.minerals)
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The Camarillas reservoir. (Author: franjungle)
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The cave was certainly real, but inside there was no trace of any crystals, not even any quartz on the roof or walls. The only good thing about it, apart from the satisfaction of actually getting there, was the rich variety of flora outside it, and the view. (Author: Mike Wood)
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The cavity left by a large (more than a meter long) spondumene crystal that was removed (doubtfully intact) (Author: Pierre Joubert)
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The Ceres valley, way in the back. (Author: Pierre Joubert)
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The Clara mine is known for a wide range of minerals - even agates occured like this 15 cm wide polished example. (Author: Andreas Gerstenberg)
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The combination between a cube of fluorite and a scalenohedral crystal of calcite is very nice. This sample comes from the "Emilio" mine near to the village of Loroñe, Caravia-Berbes region.
The crystal of Calcite have 8 cm long.
Jeff Scovil Photo (Author: jrg)
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The contents of a small pocket with up to cm. size quartz and anthraxolite bits disgorged onto the bench. (Author: vic rzonca)
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The copper shist district Mansfeld-Eisleben-Sangerhausen (Saxony-Anhalt) is - among other things - famous for its gypsum specimens. Most collectors know the colorless and grey crystals from Eisleben. From Sangerhausen (Thomas Müntzer shaft) brown elongated crystals are frequent. A certain variety are "Weißkopfgipse" (white-headed gypsum) from that locality - black crystals with colorless tops. There are big samples with crystals standing closely packed: a feast for the eyes! (Author: Andreas Gerstenberg)
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The Crosses Mine. (Author: Brokenstone)
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The crystals have one of the more classical combinations of forms from Ambasaguas, the cube and the pyritohedron, the first delicately striated. Mina Ambasaguas 1, Ambasaguas (1992). 11 x 10.8 x 5.8 cm (Author: Joan Rosell)
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The crystals here of Stibnite are very small averaging 1/8" to 3/8" (3mm to 9mm) in length. The specimen is from , the aptly named, Stibnite Creek SW of the town of Tok, Alaska. I picked tis one up in 1996. It is 2 3/4" x 1 1/2" x 1 1/2" (11.4cm x 3.8cm x 3.8cm) (Author: Jim Prentiss)
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The crystals went that way. (Author: vic rzonca)
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The cubic crystals present geometrical zones of color, some of which have inner oriented inclusions of sulfides, probably Pyrite. A border of white crystals of Calcite partially skirts the specimen.
Moscona Mine (Author: Joan Rosell)
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The current bottom of the mondo Ronna pocket worked by her and Jerry. There are some quartz crystals showing in the sericite-rich clay. (Author: Tony L. Potucek)
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The detail (Author: Jordi Fabre)
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The Diamond Bell was the first mine in Butte to have a steel headframe erected in 1898. Steel headframes were often disassembled and moved to a new mine when the original site was no longer productive. (Author: crosstimber)
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The East side of Ben a’ Bhuird is fringed with precipitous cliffs and corries, formed during the last ice-age, resulting in lots of exposed granite rock. There are not many pegmatites to see around here though, and what you find in exposures tend to be thin and stringy. (Author: Mike Wood)
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The extremophiles paradise: biogenic terraces in the acidic waters of the river Tinto. The yellow material in the shore is biogenic sulfur. (Author: Cesar M. Salvan)
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The famous Atalaya open pit, (Rio Tinto, Huelva, Spain)... (Author: Cesar M. Salvan)
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The farmer has cleared a good section of the small hill to use the soil for farm roads. Guess what, he has uncovered crystal seams! (Author: Pierre Joubert)
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The final framing. (Author: Gail)
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The final lineup. (Author: Gail)
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The find in situ, in the 1st level - 3° ribaine in the Rivet Quarry, Peyrebrune, Réalmont, Tarn
France.
The vug had 3-4 square meters. (Author: Jordi Fabre)
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The find in situ, in the 1st level - 3° ribaine in the Rivet Quarry, Peyrebrune, Réalmont, Tarn
France.
The vug had 3-4 square meters. (Author: Jordi Fabre)
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The first crystal to come out. (Author: Pierre Joubert)
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The first good lead of fun to come. (Author: Pierre Joubert)
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The first one is a nice Pyrite
from Concepción del Oro, Zacatecas.
85 x 105 x 90 mm
Main crystal: 13 mm on edge (Author: Carlos M.)
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The first place where I found many small crystals, often on manganese rich matrix. (Author: Pierre Joubert)
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The first pool I visited. (Author: Pierre Joubert)
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The first works before the opening of the mine in 1985 (Author: jesus balmaseda)
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The fishtailed one (Author: nurbo)
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the fishtailed ones other side (Author: nurbo)
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The footpath weaves through a carpet of bilberry (blueberry) and heather between the Caledonian Pines. A remnant of the ancient forest which once was far more extensive than it is today. (Author: Mike Wood)
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The fossilized wood on limestone (Author: k-m.minerals)
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the front (Author: nurbo)
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The gable end of the winch house. (Author: vic rzonca)
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Mina Ampliación a Victoria, Sierra de Alcarama, Navajún, Comarca Cervera, La Rioja, España
(Autor: supertxango) -
The Granite Mountain-Speculator mine was the site of one of the worst underground mine disasters in the U.S. On June 8, 1917, a crew inspecting an electrical cable, accidentally started a fire with a carbide lamp, resulting in the loss of 167 lives. (Author: crosstimber)
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The Heysham Anti-cline collecting site for ancient sea critters. 20 minutes from my house. (Author: nurbo)
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The image that Michael published here.
Chalcocite
Tongshan Mine, Daye Mine, Huangshi Pref., Hubei Prov., China
1.0 x 4.7 cm
Stalactitic chalcocite coated with a thin film of iridescent chalcopyrite. (Author: Jordi Fabre)
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The images with mannequins came from the full scale exhibits found inside the hall of fame. See this bit of mining history if you can. (Author: vic rzonca)
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The Irv Brown Room, aka the Rose room. Three cabinets in here, the photo above shows the other one. (Author: Gail)
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The kids getting a little collecting in. (Author: vic rzonca)
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The label (Author: Pinch Bill)
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the label (Author: nurbo)
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The label (Author: Jordi Fabre)
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The Label (Author: nurbo)
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The label for the above stilbite. (Author: crosstimber)
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The label i got with this specimen, from Sapo mine grandmaster Luiz Menezes himself ;-) (Author: Tobi)
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the label of J. Béhier (Author: Benj)
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Mina Büchenberg, Elbingerode, Oberharz am Brocken, Harz, Sajonia-Anhalt/Sachsen-Anhalt, Alemania
(Autor: Tobi) -
The labels (Author: Jordi Fabre)
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The ladders leading to the Courvercle Hut from the Leschaux Glacier. This photo was taken much later in 2005, the ladders are in a different position to what they were in 1991. They are longer and steeper now, if I remember rightly. (Author: Mike Wood)
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The large pocket. (Author: Pierre Joubert)
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The last stretch; not as easy as it seems. (Author: Pierre Joubert)
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The locality (Author: h.abbasi)
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The longest topaz crystal (~ 25 mm) on this specimen. (Author: Tobi)
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The lower part of the showcase, with larger specimen. (Author: Herman van Dennebroek)
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The lower part: Layer 5 (other sulfides, vanadinites, calcites and some others), layer 6 (barytes and German fluorites) and last but not least layer 7 with my best international fluorites. (Author: Tobi)
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The main crystal (width 17 mm) held against a light source. The red colour of the inner crystal comes apparent. Compare this to the normal pictures taken in daylight where the crystals are simply greenish-blue (see my previous post). (Author: Tobi)
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The main crystals on the upper side of the specimen. (Author: Tobi)
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The man who crafted this label really loved his collection... All laborious handmade, former Antonjewitsch collection/Berlin (about 1950). (Author: Andreas Gerstenberg)
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The mat before I take out the drop out. (Author: Gail)
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The mentioned spectrum of the Duftite (Author: Jordi Fabre)
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The microscope Carl Zeiss Discovery.V20 mentioned for Christian. (Author: Rewitzer Christian)
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Mina Ampliación a Victoria, Sierra de Alcarama, Navajún, Comarca Cervera, La Rioja, España
(Autor: supertxango) -
The mine... (Author: Benj)
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The mineral case in my office at work. (Author: Darren)
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The moss was fat and happy on this December day, with late afternoon sun, waiting on the first snow. (Author: vic rzonca)
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Příbram, Región Bohemia Central, Bohemia, República Checa
(Autor: Psax) -
The motley crew of Tony Potucek, Ken Roberts, and Neil Prenn enjoying a brief respite during the quartz dig. Photo by Scott Werschky. (Author: Tony L. Potucek)
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The Mountain Consolidated, or Mt. Con, was the deepest mine at Butte. The main shaft was 5,380 feet deep, and because of its depth, it was a very hot mine to work in. It produced excellent specimens of bornite chalcocite, enargite, and pyrite. (Author: crosstimber)
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The mountain draws closer and the gradient increases (Author: Mike Wood)
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The narrow section does not conduct light like the rest. This suggests a repair or worse. However, when you look at it closely, it doesn’t look repaired. No fluorescent glue shows under UV. (Author: Matt_Zukowski)
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The new pocket area. (Author: Pierre Joubert)
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The next morning I walked back to base where I’d left my car at the Cairngorm Ski Centre. The fog came back with a vengeance and the wind blew strong, but I spied out the route before the view was obscured and used a map and compass. After about an hour I came across a large familiar footpath which led me safely off the mountain. I decided to return when there was less snow, which I did six weeks later for one superb day in July. (Author: Mike Wood)
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The north summit of Ben a’ Bhuird, just a little under 4,000ft above sea level, and a long walk from anywhere. This high-level plateau is further east than the highest mountains, posted earlier. Still part of the same granite pluton. Photo taken august 2011. (Author: Mike Wood)
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the old label (Author: Benj)
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The old label on the backside. (Author: Andreas Gerstenberg)
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The old label that came with the specimen (Author: Tobi)
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The older label dates from about 1790 I would say. Translation of the text as follows: flaky native silver in grey hornstein quartz, Johanngeorgenstadt, Saxony. (Author: Andreas Gerstenberg)
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The only fish of the day:-( (Author: Pierre Joubert)
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The original analysis and report written by the missed Dr. Joan Viñals (Author: Jordi Fabre)
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the other part of the big ugly anatase. (Author: parfaitelumiere)
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The othere side of the same piece. (Author: John S. White)
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The page from L.R.M. no. 166 that features this elbaite © Le Règne Minéral (Author: Tobi)
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The Parisian ( Parisienne? ) room. I took out the family antiques and gave them to the kids...we need room for minerals! This room has four new cabinets. (Author: Gail)
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The pass towards Ceres. The photo was taken about 2km outside of Ceres. (Author: Pierre Joubert)
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The Pic du Midi volcanoe, French Pyrenees, 2884 metres high. (Author: Benj)
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The Pinch Medal is a prize awarded every two years by the Mineralogical Association of Canada, and is given to the people in the field of amateur mineralogy who have made an outstanding contribution to the science of mineralogy.
All photos: Gail Spann (Author: Pinch Bill)
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The pit. (Author: John S. White)
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The place of interest. New, unexplored area. (Author: Pierre Joubert)
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The pocket and the direct area around it. (Author: Pierre Joubert)
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The pocket area. (Author: Pierre Joubert)
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The pocket area. (Author: Pierre Joubert)
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The pocket extended futher under the rocks but getting better. Next time we will continue where we left off. (Author: Pierre Joubert)
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The pocket that yielded most of the crystals. I took this photo by flash. (Author: Pierre Joubert)
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The pocket underneath a large rock. (Author: Pierre Joubert)
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The pockets exposed. (Author: Pierre Joubert)
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The Portalet... (Author: Benj)
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The Proctor case. (Author: vic rzonca)
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The pump section. The shims are aluminum as it deforms into the rock rather than slipping. We have 60 and 100 ton models-great help. (Author: vic rzonca)
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The purchases from Ray Grant, our guest speaker, last evening. (Author: Gail)
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The rain has been abundant. Pockets can be seen exposed a meter or less below grade. We would like to believe this zone continues away from the house. We resist the urge to tear it up so near to the house and barn. And the snow is close so we must cover the line and reclaim the yard. (Author: vic rzonca)
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Dirtlow Rake, Castleton, Distrito High Peak, Derbyshire, Inglaterra / Reino Unido
(Autor: Forrestblyth) -
The reason for all the gravel making. (Author: vic rzonca)
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Hvalfjörður, Reikiavik Norte, Islandia
(Autor: Bergur_E_Sigurdarson) -
The reverse side. Very dirty. (Author: vic rzonca)
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The road in front of our house facing the mountains closest to our home. (Author: Pierre Joubert)
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The rock full of crystals. (Author: Pierre Joubert)
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The safety lecture before being allowed to enter the pit. (Author: John S. White)
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The same amazing plant. I have only seen this plant (flower) in this area (Ceres) (Author: Pierre Joubert)
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The same as above photo. (Author: Pierre Joubert)
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The same as above. (Author: Pierre Joubert)
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The same as above. (Author: Pierre Joubert)
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The same as above. (Author: Pierre Joubert)
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The same citrine Quartz in a garden. (Author: José Miguel)
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The same crystal standing up (Author: Jordi Fabre)
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The same quarry where gypsum; calsite and some other strange mineral is to be found. (Author: Pierre Joubert)
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The same reservoir, with a small clear stream running into it. (Author: Pierre Joubert)
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The same snake, close up. (Author: Pierre Joubert)
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Cantera Calcite, Holzen, Arnsberg, Sauerland, Renania del Norte-Westfalia/Nordrhein-Westfalen, Alemania
6,1 x 5,9 cm (Autor: Niels Brouwer) -
The scene behind us from the pocket. (Author: Pierre Joubert)
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The second (German) label ("variscite from Meßbach near Plauen"). (Author: Andreas Gerstenberg)
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The second pocket, about 30 m from the other. (Author: Pierre Joubert)
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The semi-desert had some good rain. (Author: Pierre Joubert)
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The shape and orientation of the bright {110} face provide the easiest way to deduce that the surrounding faces are {113}. {112} would give the same diamond shape with angles of 70.5° and 109.5° but oriented the other way, acute corners towards the cube face. {114} and higher forms would cut narrower rhombs out of the {110} face. (Author: Gerhard Niklasch)
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The small dog has a habit of finding a comfortable place to sleep when we take too long. (Author: Pierre Joubert)
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The small dot on the open piece of ground, is my car. (Author: Pierre Joubert)
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The small valley where I found this pocket with fadens. (Author: Pierre Joubert)
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The smaller pocket that goes straight down. (Author: Pierre Joubert)
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The South Face of the Aiguille du Moine, above the spot where I was bivouacing for the night. The cave where I found the crystals is high on the upper part of the South Face. The next morning I climbed up the mountain from the top of the snowfield, trending leftwards along ledges to reach a gully, which eventually led to the arete on the left. Then the climbing got even harder..
Photo scanned from slide. (Author: Mike Wood)
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The specimen come from the "San Lino" open pit in Caravia Alta, and shows a group of cubic crystals of fluorite about 1,5 cm edge upper a baryte crystal of 8 cm higth.
Jeff Scovil Photo (Author: jrg)
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The specimen have the most frequent paragénesis of "La Cabaña" area, but it is really difficult to find an aesthetic specimen with all of them together
12 x 14 cm.
J. R. García Photo (Author: jrg)
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The specimen is a nice series of cubes of 1,5 cm edge on a baryte crystal layer. These associations are characteristic of the famous place of "La Cabaña" in Berbes village, Ribadesella.
Jeff Scovil Photo (Author: jrg)
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The Steward Mine was staked in 1877 and operated until 1975. A total of 79 men lost their lives in the Steward during it 98 years of operation. The main shaft was 3,900 feet deep and was one of the richest copper/silver mines in the district. It produced fine specimens of barite, bornite, and tennantite. (Author: crosstimber)
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The summit ’tor’ of Beinn Mheadhoin (’Ben Vane’). These ’tors’ are known as ’barns’ locally. From a scanned photo taken in June 1994. (Author: Mike Wood)
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The summit of Ben Avon, zoom photo from Ben a’ Bhuird. Both of these mountains are huge and sprawling by UK standards. August 2011. (Author: Mike Wood)
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The surface of the same specimen. (Author: Andreas Gerstenberg)
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The surroundings after sunset. (Author: Pierre Joubert)
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The surroundings. (Author: Pierre Joubert)
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The team waits a little nervously to get their load. Alot of fire wood and some lumber logs come off the ridge. (Author: vic rzonca)
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the TNs. (Author: Gail)
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The top (Author: nurbo)
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The trackhoe, without which we would not have collected very much. Approximately every half hour or so Foster scrapes rock off of some of the walls of the pit, usually exposing a lot of pockets. (Author: John S. White)
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The trimmer frame is about 40 cm. high by 35 cm. wide. (Author: vic rzonca)
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The Trout Lily. (Author: vic rzonca)
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The two following images show the complex morphology that is in fluorites of the mine Emilio in Loroñe. In the first photography a tetraquishexahedral crystal of 2 cm of edge implanted on a cubical crystal layer can be seen.
Jeff Scovil photo. (Author: jrg)
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The two pieces below actually puzzle together. (Author: Turbo)
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The two terminations. (Author: nurbo)
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The underside (Author: nurbo)
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The upper part of the display: Layer 1 (garnets, tourmalines, beryls and some others), layer 2 (pyromorphites, wulfenites, apatites and some gem minerals), layer 3 (smoky quartzes, amethysts, mimetites and others). (Author: Tobi)
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The vicinity just above the digging area. (Author: Pierre Joubert)
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the view from my clearview claim Passmore BC (Author: thecrystalfinder)
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The vug is about 15 cm.. Sorry about the quality of the shot. (Author: vic rzonca)
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The way follows the Glacier de Leschaux for a little distance; where this glacier meets the Mer de Glace there are a lot of rocks about. (Lateral moraine?). I stopped to examine some of these boulders and found tiny crystals of pink fluorite in places.
Photo scanned from slide. (Author: Mike Wood)
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The weight. (Author: vic rzonca)
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The White on this site is only a little less brutish. (Author: vic rzonca)
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The whole display, filled with rocks and illuminated. (Author: Tobi)
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The Y-12 Girls (Author: Lumaes)
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The »Calcite« quarry in Stahovica (Author: Leon56)
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Theisite, Adamite and Azurite
Mina Les Ferreres, Rocabruna, Camprodon, Comarca Ripollès, Gerona / Girona, Cataluña / Catalunya, España
fov 1.4 mm (Autor: ploum) -
Theisite, Azurite
Gratlspitze, Thierbach, Wildschönau, Distrito Kufstein, Valle Inn, Tirol Norte, Tirol, Austria
5,5 x 3,5 cm (Autor: Volkmar Stingl) -
Theisite, Malachite, Dolomite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
7,5 x 4 cm (Autor: Volkmar Stingl) -
Theisite, Malachite, Dolomite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
7,5 x 4 cm (Autor: Volkmar Stingl) -
Theisite, Veszelyite
Distrito Dongchuan, Prefectura Kunming, Provincia Yunnan, China
3 x 2,5 cm (Autor: Volkmar Stingl) -
Theisite, Veszelyite
Distrito Dongchuan, Prefectura Kunming, Provincia Yunnan, China
3 x 2,5 cm (Autor: Volkmar Stingl) -
Theisite
Distrito minero Ringenwechsel, Troi, Distrito Schwaz, Valle Inn, Tirol Norte, Tirol, Austria
FoV ca. 1,5 x 1,5 cm (Autor: Volkmar Stingl) -
Theisite
Gratlspitze, Thierbach, Wildschönau, Distrito Kufstein, Valle Inn, Tirol Norte, Tirol, Austria
6 x 4,5 cm (Autor: Volkmar Stingl) -
Theisite
Gratlspitze, Thierbach, Wildschönau, Distrito Kufstein, Valle Inn, Tirol Norte, Tirol, Austria
6 x 4,5 cm (Autor: Volkmar Stingl) -
Then there are these. (Author: vic rzonca)
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Then you have to descend these steel ladders to get to the glacier (there are two sets of parallel ladders these days).
Photo scanned from slide. (Author: Mike Wood)
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Thenardite
Lago Searles, Desierto de Mojave, Condado San Bernardino, California, USA
4.1 x 8.7 cm. (Autor: crosstimber) -
There are still many crystals left in the pocket, including this big cluster, which I think will be difficult to remove intact. (Author: Pierre Joubert)
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There is an article on finding a pocket on this site, this might be better off there. How to find a pocket? Take a rock and hit it with a hammer. (Author: vic rzonca)
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Thermonatrite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 2mm (Autor: Doug) -
These are beautiful, this is an old specimen from Panthahole mine, close to Mt.Gaba Ant Bwe Taung (Ant Pywe Taung), northeast of Mogok, Molo quarter, Momeik Township, Burma (Myanmar) The whole piece measures 52 x 34 x 26 mm and the crystals: 9 x 8 x 6 mm (Author: nurbo)
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These Hemimorphites will be classics in the years to come. 14 cm x cm 8 x 6 cm (Author: Samuel)
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These small tetrahedral crystals of Helvite are on Albite matrix. They are from the Navegador Mine, Minas Gerais, Brazil. The crystals average about 1/4" (6mm). (Author: Jim Prentiss)
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These, seemingly formless, Calcite crystals, that have obvious rhombohedral terminations, caught my eye some years ago, in a little out of the way rock shop in Anchorage. They are from Irai, Rio Grande do Sul, Brazil and average about 1 1/4" x 3/8" (3.18cm x 0.95cm) (Author: Jim Prentiss)
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They come out pieces. (Author: Joan Martinez Bruguera)
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They don’t last very long, going from white, to pink, to wilted in a day it seems. (Author: vic rzonca)
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They goofed on the label, no scheelite included in this piece. But I love the shape of the fluorite. (Author: Gail)
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They may not be in the same league as pyrite from Navajun - but i guarantee not as many folks have these! collected from a Gold mine in Snowdonia, North Wales, the Pyrites crystals are about 1cm on edge. (Author: Colleen Thomson)
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Mina Cavnic, zona minera Cavnic, Cavnic, Maramures, Rumanía
9,5 x 6,5 x 2 cm (Autor: Niels Brouwer) -
Thin yellow-green beryl "straws" (Author: xenolithos)
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Things that go boom!!! (Author: Lumaes)
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This 5 cm wide sample with corroded galenite crystals is from Freiberg too but not that old as the above shown dolomite. It comes from a little new find at the Rote Grube in the very "city center" of Freiberg. The find contained I think some ten specimens and the sample looks forward to become a classic rarity one day. (Author: Andreas Gerstenberg)
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This appeared inside a piece of septarian mudstone I chopped up, I have absolutely no idea what it is/was, the stone is from Carboniferous strata, an area called "The Caton Shales" in the north west of England,near my home. Ive recovered maybe 200 or so specimens from this area but this is unlike any of the others. Im tempted to cut it lengthways so as to see another view which may yield further clues. size 135 x 40 mm (Author: nurbo)
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This area has many smaller pockets that looks promising but does not necessary deliver much. (Author: Pierre Joubert)
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This Bismuth is from Wolfram Camp, Dimbulah, Queensland, Australia. The field of view is 1" (2.54cm). (Author: Jim Prentiss)
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This Bournonite, from the Quiruvilca District, La Libertad Department, Peru, shows the classic "cogs wheel" Habit. The crystals average about 1/4" (6mm) in diameter. (Author: Jim Prentiss)
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This bright green "jackstraw" crystal aggregate of Actinolite I picked up along the Kobuk River near the Village of Deering in western Alaska in 1994. It is 4 1/2" x 3" x 2 1/2" (11.7cm x 7.6cm x 6.4cm) (Author: Jim Prentiss)
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This bronze flaky Coalingite, from the type locality in Fresno Co., California, is like most of my type locality speimens, not especially pretty, but like the orange Calite it has a good color. The flakes are very tiny and the field of veiw in the photo is 1" (2.5cm) (Author: Jim Prentiss)
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Hvalfjörður, Reikiavik Norte, Islandia
(Autor: Bergur_E_Sigurdarson) -
This chap drilled one hole to many (my leg). I managed to seriously damage his machinery. (Author: Pierre Joubert)
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This Chrysocolla is yet another example of one of my favorite habits. Also, the blue color is, to me, quite attractive, despite the ugly matrix. It is 2 1/4" x 2" (5.72cm x 5.08cm) and is from the Kolwezi Mine, Kolwwezi, Western Area, Shaba Copper Belt, Shaba (Katnga), Democratic Republic of Congo (Zaire). (Author: Jim Prentiss)
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This complete, etched xtal has both kunzite and hiddenite areas within. Note the triangular etch features. (Author: Matt_Zukowski)
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This dolomite pseudo is definitely a favourite of mine. You know these pseudos after calcite scalenohedrons very well from the Schlema district, Erzgebirge, Saxony. But - this one is from Freiberg, precisely from the Abraham Shaft. It comes from a miner collection and was collected in the 1920s. It is the first one I ever saw from Freiberg and I think it will be the last... (Author: Andreas Gerstenberg)
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This Epidote I picked up as a teenager out hunting one day, on Green Monster Mountain, Prince of Wales Island, Alaska. Around 1972-73. It is an old joke between my buddy and I that he got a three point buck that day and I got a rock! It is 3 1/4" x 1 1/2" x 3/4" (8.3cm x 3.8cm x 1.9cm). It is a partial crystal and ypu can get a sense of how large it would have been. (Author: Jim Prentiss)
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This galena from Pente has done a real world trip. Found at Pente near Osnabrück/Lower Saxony it came to the Munich collector Willy Hirsch. As you see, there are some french additions on the label. These were written by the Paris mineral dealer Neree Boubee. Then the Sorbonne bought the specimen, sold it later to the German dealer Fritz Krantz. It was bought then from the collector Richartz in Cologne, who left it to the Berlin mineral dealer Klaus Lenz from whom I finally got it... (Author: Andreas Gerstenberg)
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This Hanksite crystal is from the type locality at Searles Lake, San Bernardino Co., California. It is 5" x 4 1/2" in Diameter (12.7cm x 11.4cm) (Author: Jim Prentiss)
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This has the "Chisel shape" mentioned earlier (Author: nurbo)
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This humble Realgar specimen has a couple of well formed brightly colored crystals scattered about which are better viewed with at least a 10x. The crystals average about 1/16" (1.6mm) from Royal Reward Mine, Green River Gorge, Franklin, King County, Washington. (Author: Jim Prentiss)
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This image corresponds to a sample of the Emilio mine with cubes of about 2 to 3 cm of edge on calcite crystals.
Jeff Scovil photo. (Author: jrg)
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This image shows the sedimentary nature of the Little Falls dolostone. The exposed section is about 5’ high and clearly shows a foamy silicified stromatolithic layer below a finer grained strata. The days digging began to the right of this corner. (Author: vic rzonca)
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This is "starburst" Pyrophyllite from Indian Gulch, Mariposa County, Calfornia. The field of view is about 1 1/2" (3.8cm) (Author: Jim Prentiss)
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This is a "Somerset Potato" The farmers turn them up in the fields of Somerset and when they are covered in mud they look like Potatoes, They contain Calcite, Quartz and sometimes Amethyst. (Author: nurbo)
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This is a busy little piece. It took nearly fifteen years to get the whole story from the Alaska Geological Survey, on this ugly little specimen. It is Calcite var. Glendonite pseudomrph after sand included Glauberite. I picked it up Near Carter Creek, North Slope, Alaska, while crewing a helicopter in 1983. It is 2 1/2" x 1 5/8" (6.35cm x 4.13cm) (Author: Jim Prentiss)
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