-
Nice yellow tetrahedrons of the rare beryllium silicate helvite from the type locality, Unverhofft Glück mine near Antonsthal, Erzgebirge, Saxony. Sitting with some diopsite and sphalerite on calcite. The largest tetrahedron measures a little more than 3 mm. (Author: Andreas Gerstenberg)
-
Nice, new trowel. (Author: vic rzonca)
-
Nickeline
Cala Mines - Cala - Huelva - Andalusia - Spain
6,9 x 3,8 cm
Aggregate of crystals; 1,2 cm. Found in 2001. (Author: DAni)
-
Nickeline
Eisleben, Mansfeld Basin, Sajonia-Anhalt/Sachsen-Anhalt, Alemania
2 mm (Autor: Rewitzer Christian) -
Nickelskutterudite (chloanthite)
Mina Weißer Hirsch, Distrito Schneeberg, Erzgebirgskreis, Sajonia/Sachsen, Alemania
7 x 5 cm (Autor: Andreas Gerstenberg) -
Nifontovite, 6 cm across group. Rey y Reina Mine, Charcas, San Luis Potosi, Mexico.
Big brother to the one my daughter won the Lidstrom Trophy with at Tucson in 2009 (Author: Peter Megaw)
-
Nifontovite, 7 cm single crystal, Rey y Reina Mine, Charcas, San Luis Potosi, Mexico.
Inclusions are bakerite and calcite (Author: Peter Megaw)
-
Nifontovite
Charcas
San Luis Potosi
Mexico
2,2cm (Author: parfaitelumiere)
-
Nifontovite
Mina Rey y Reina, Charcas, Municipio Charcas, San Luis Potosí, México
5.3 x 1.5 x 1.0 cm (Autor: Michael Shaw) -
Niobokupletskite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 2mm (Autor: Doug) -
Niobophyllite with Aegirine and Orthoclase
Machinga, Distrito Machinga, Región Sur, Malawi
4 × 3.7 × 2.6 cm / main crystal size: 3.5 × 1 cm (Autor: Jordi Fabre)Niobophyllite with Aegirine and Orthoclase
Machinga, Distrito Machinga, Regió -
Niveolanite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4.0 mm (Autor: Doug) -
Nontronit (St. Andreasberg).JPG (Author: Andreas Gerstenberg)
-
Nontronite (variety Ca-rich Nontronite)
Pedrera Can Súria (Pedrera Guixeres), Maçanet de la Selva, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
FOV 7 mm (Autor: Firmo Espinar) -
Nontronite (variety Ca-rich Nontronite)
Pedrera Can Súria (Pedrera Guixeres), Maçanet de la Selva, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
FOV 7 mm (Autor: Firmo Espinar) -
Nontronite (variety Ca-rich Nontronite)
Pedrera Can Súria (Pedrera Guixeres), Maçanet de la Selva, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
FOV 8 mm (Autor: Firmo Espinar) -
Nontronite
Pedrera Can Súria (Pedrera Guixeres), Maçanet de la Selva, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
FOV 23mm (Autor: Firmo Espinar) -
Nontronite
Pedrera Can Súria (Pedrera Guixeres), Maçanet de la Selva, Comarca La Selva, Gerona / Girona, Cataluña / Catalunya, España
50mm x 46mm x 40mm (Autor: Firmo Espinar) -
Norbergite and Spinel on Calcite
Oak-saung-taung, Valle Mogok, Mogok, Distrito Pyin-Oo-Lwin, Región Mandalay (Division Mandalay), Myanmar (Burma)
Specimen size: 9.3 × 8.4 × 4.3 cm (Autor: Jordi Fabre) -
Norbergite, Diopside SW UV
Rhein Property, Amity NY USA
15 cm (Author: Glenn Rhein)
-
Nordstrandite
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
FOV=2mm (Author: Doug)
-
Normandite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 2mm (Autor: Doug) -
north geronimo mine La Paz AZ.jpg (Author: d_hawtho)
-
Not even frequent is bismuthinite from Altenberg, Erzgebirge, Saxony. The pic shows a 1 x 1 cm needle aggregate on fluorite and quartz from the Römer Shaft, dating from the 1950s. (Author: Andreas Gerstenberg)
-
Not long after starting to dig. (Author: Pierre Joubert)
-
Not much to look at, really. (Author: vic rzonca)
-
Not so bad topaz crystal, that nested in a matrix of lepidolite crystals, from Virgem da Lapa, Jequitinhonha valley, Minas Gerais, Southeast Region, Brazil
Size 105 x 70 x 60 mm (Author: olelukoe)
-
Not so easy ;) (Author: ploum)
-
Not the ’Famous Grouse’ - this is the infamous ptarmigan! Brown in summer and white in winter, this fine fellow appears to be in full breeding plumage. I think that’s why he was standing his ground - you don’t normally get this close to them, even with a zoom lens. (Author: Mike Wood)
-
Not the last day on the bench, but close. Was that a snow flake Don? (Author: vic rzonca)
-
Now it is my turn at the pocket. (Author: Pierre Joubert)
-
Nut clearing. (Author: vic rzonca)
-
nvnvnv.JPG (Author: Pierre Joubert)
-
O,O,O wow and this....! (Author: h.abbasi)
-
Obidian Picture one, Origin Unknown
7.7cm x 4.9cm x 3.1cm (Author: Screenname)
-
Oblique view, crossed-eye stereo pair (Author: Gerhard Niklasch)
-
Obsidian Picture two, Origin Unknown
7.7cm x 4.9cm x 3.1cm (Author: Screenname)
-
Oco agates
(Author: Kelly Jean)
-
Octahedral Fluorite crystals with well defined edges and faces. Pointe Kurz (3600 m altitude) Haute-Savoie, France. Main crystal size is 2.1 x 1.5 cm.
Specimen & Photo: Fabre Minerals (Author: Joan Rosell)
-
Octahedral Fluorite on Albite matrix with Smoky Quartz. (2001) Pointe Kurz (3600 m altitude) Haute-Savoie, France. Size 19x 15.5 x 9 cm.
Specimen & Photo: Fabre Minerals (Author: Joan Rosell)
-
Octahedral Fluorite with Dolomite and Quartz
Mina Shangbao, Leiyang, Prefectura Hengyang, Provincia Hunan, China
Specimen size: 11.3 × 9.5 × 9.2 cm / main crystal (Autor: Jordi Fabre)Octahedral Fluorite with Dolomite and Quartz
Mina Shangbao, Leiyang, Prefectura Hengyang, Provinc -
Octahedral green Fluorite. O.T.E. Prospect, Grant County, New Mexico, USA. The "digger" is a friend of mine. About 13 cm. (Author: Darren)
-
Octahedral Pyrite; Huanzala Mine, Huallanca dist., Huanaco, Peru.
Specimen dimensions 60 x 38 x 24mm, xx to 31mm (edge), weight 98g. GN’s collection id 09PEP-001.
Stereo pair, taken in direct sunlight. (Author: Gerhard Niklasch)
-
Octahedral Pyrite; Huanzala Mine, Huallanca dist., Huanaco, Peru.
Specimen dimensions 60 x 38 x 24mm, xx to 31mm (edge), weight 98g. GN’s collection id 09PEP-001.
Stereo pair, taken in direct sunlight. (Author: Gerhard Niklasch)
-
Octahedral Pyrite; Huanzala Mine, Huallanca dist., Huanaco, Peru.
Specimen dimensions 60 x 38 x 24mm, xx to 31mm (edge), weight 98g. GN’s collection id 09PEP-001.
Taken in direct sunlight. (Author: Gerhard Niklasch)
-
Octahedral Pyrite; Huanzala Mine, Huallanca dist., Huanaco, Peru.
Specimen dimensions 60 x 38 x 24mm, xx to 31mm (edge), weight 98g. GN’s collection id 09PEP-001.
Taken in direct sunlight. (Author: Gerhard Niklasch)
-
Offretite
Fittà, Soave, Verona Province, Veneto, Italy
1.32 mm geode with some Offretite acycular crystals under ball formation (Author: Matteo_Chinellato)
-
Offretite
Fittà, Soave, Verona Province, Veneto, Italy
1.45 mm area with several Offretite crystal under ball formation (Author: Matteo_Chinellato)
-
Offretite
Scagno Mt., Case Nori, Montorso Vicentino, Vicenza province, Veneto, Italy
Nice group of 2 mm Offrétite tufts (Author: Matteo_Chinellato)
-
Offset at the fault line of the Holyoke range. (Author: vic rzonca)
-
Oh my... (Author: Gail)
-
Oisgill Bay, Isle of Skye, Scotland
The north end of Oisgill bay. An Ceannaich is the cliff around the corner. The cliffs are 600 feet (190m) high and scary / awe-inspiring !
Photo taken Easter 2013. (Author: Mike Wood)
-
Okaruso mine flourite crystal cluster-namibia-73g.jpg (Author: Anton Potgieter)
-
Okenite
Kandivali Quarry, Malad, Mumbai District, Maharashtra, India
17.4 x 29.8 cm.
An elongated cavity in black basalt lined with white spheres of acicular okenite, prismatic white laumontite, and hemispheres of white gyrolite. (Author: crosstimber)
-
Okenite
Khnadivali Quarry, Mumbai, Maharashtra, India
1mm x Sub mm (Author: Mark Ost)
-
Okenite
Khnadivali Quarry, Mumbai, Maharashtra, India
1mm diameter (Author: Mark Ost)
-
Okenite
Poonah, Maharashtra, India
8x6x5 cm (Author: B&A)
-
Okenite, Gyrolite, Quartz
Cantera Malad, Malad, Mumbai (Bombay), Distrito Mumbai, Maharashtra, India
18.0 x 13.5 cm (Autor: am mizunaka) -
Okenite, Gyrolite
Distrito Nashik (Nasik), Maharashtra, India
11 x 10 cm (Autor: Volkmar Stingl) -
Okenite, Prehnite, Apophyllite, Gyrolite
Mumbai (Bombay), Mumbai District (Bombay District), Maharashtra, India
6.3 x 4 cm (Author: xdxucn)
-
Okenite, Prehnite, Apophyllite, Gyrolite
Mumbai (Bombay), Mumbai District (Bombay District), Maharashtra, India
6.3 x 4 cm (Author: xdxucn)
-
Okenite, Stilbite
Valea Arsului, Brad, Transylvania, Romania
FOV 45 mm
An active quarry close to the old gold mines of Brad yield nice and unusual Zeolite minerals in Dacite (Author: Gerhard Brandstetter)
-
Okenite
Cantera Malad, Malad, Mumbai (Bombay), Distrito Mumbai, Maharashtra, India
Detail (Autor: Firmo Espinar) -
Okenite
Cantera Malad, Malad, Mumbai (Bombay), Distrito Mumbai, Maharashtra, India
Detail (Autor: Firmo Espinar) -
Okenite
Cantera Malad, Malad, Mumbai (Bombay), Distrito Mumbai, Maharashtra, India
97mm x 63mm x 26mm (Autor: Firmo Espinar) -
Okenite
Cantera Malad, Malad, Mumbai (Bombay), Distrito Mumbai, Maharashtra, India
97mm x 63mm x 26mm (Autor: Firmo Espinar) -
Okenite
Cantera Bombay, Distrito de Mumbai suburbano, Maharashtra, India
90 mm x 40 mm x 10 mm (Autor: Dany Mabillard) -
okoruso-2-1.jpg (Author: Montanpark)
-
OLD BRIDGE VERSUS NEW BRIDGE 1
An early 1900s photograph captures the raw, industrial might of the Roebling suspension bridge at Ojuela, its steel towers piercing the sky above a deck lined with tram tracks. A vital artery of commerce, it tirelessly ferried ore from the mountain’s depths, its existence defined by the relentless clatter of carts and the dust of a booming mine. A century later, this monument to engineering has undergone a profound metamorphosis. The cacophony of industry has faded into an echoing silence, and the bridge has been reborn as a celebrated icon for adventurers.
Today, its purpose is not to extract wealth from the earth, but to offer an experience suspended between sky and canyon. The steel skeleton remains, but the heavy tracks have been replaced by a rustic wooden walkway that invites visitors to traverse the gorge. Each footstep on the creaking planks, each gust of wind that sets the structure into a gentle, thrilling sway, serves as a visceral connection to the past. The passage offers breathtaking, panoramic views of the ghost town the bridge once single-handedly sustained.
This transformation extends to the very ground once dominated by the mining tramway. Where carts once disgorged their rocky cargo, a vibrant marketplace now thrives. Local vendors and artisans display their wares — gleaming mineral specimens, handcrafted trinkets, and traditional foods — offering a new, gentler kind of local resource. Visitors can now zip-line across the canyon, soaring past the historic structure. The Ojuela Bridge stands not as a static relic, but as a kinetic monument, connecting modern thrill-seekers to the rugged soul of a history they can feel with every swaying step. (Author: silvia)
-
Old french label, former Leonhard collection. (Author: Andreas Gerstenberg)
-
Old hematite specimen from Tilkerode, Harz mtns. (famous for selenide minerals). 52 mm in width. (Author: Andreas Gerstenberg)
-
Old label (around 1900) (Author: Andreas Gerstenberg)
-
Old label of a Moschellandsberg cinnabar. About 1880. (Author: Andreas Gerstenberg)
-
Old label Stephanite Bräunsdorf (Author: Andreas Gerstenberg)
-
Old labels of calcite (Author: Roger Warin)
-
OLD MINE VERSUS MODERN MINE 1
A photograph from the early 1900s captures the sweeping vista and desolate beauty of Ojuela. Anchoring the view in the lower right, the weathered, steel head frame of the Socavon Shaft stands as a stark monument against the rugged landscape.
A century later, the gaze northward finds only silence and skeletal remains. The landscape is dominated by a profound shadow, a scar on the earth that refuses to heal; the Boca de Mina, the Mouth of the Mine. This vast, dark chasm — the original glory hole — is a gaping wound testifying to a history of arduous toil.
While this great mine endures, carved in stone, the works of man have proven fleeting. The steel head frame of the Socavon shaft has surrendered to the elements, its bones scattered by the wind. Entirely vanished is the company town that was once a world unto itself. Where grids of simple houses sheltered five thousand souls, the wind now scours empty ground, and faint outlines in the dirt are the only ghosts of those dusty streets. No echo remains of the modest schoolhouse, the offices, the shafts, the workshops, no phantom of the bustling stores that once anchored this outpost of rock and toil.
The mountain gave its treasure, and in the passage of a century, it has reclaimed all but the wound. The great mine has outlived its children, its open mouth now a monument to their memory and the profound quiet that follows. (Author: silvia)
-
OLD MINE VERSUS MODERN MINE 2
The upper photograph, dating to the late 1800s, reveals the Ojuela miner’s village as a bustling, self-contained settlement clinging to the mountainside. Tiered rows of miners’ modest dwellings are perched above the industrial heart of the operation: a dense cluster of offices, workshops, and amenities. Dominating the foreground, two main head frames stand as powerful sentinels, their structures marking the vital gateways to the subterranean workings that were the community’s entire reason for being. This was a place of relentless industry, carved directly into the unforgiving landscape.
Over a century later, the modern photograph tells a story of profound decay and reclamation. The mighty head frames have vanished, and the steep slopes where the miners’ dwellings once stood are now hauntingly bare, their former existence marked only by scattered stone foundations — the ghostly footprints of a lost community. Below, the once-thriving centre of the mine has crumbled into dilapidated shells, a somber monument to a bygone era of immense wealth and hardship. Amidst the general ruin, the more robust, stone-walled structures of what were likely the workshops, blacksmith, and engineering facilities stubbornly endure, their skeletal remains the last vestiges of the mine’s formidable power. (Author: silvia)
-
OLD MINE VERSUS MODERN MINE 3
A photograph from the late 1890s captures the Ojuela mine at the zenith of its industrial power, a complex and sprawling machine carved into the rugged landscape. The view is dense with the sinews of production: robust workshops, the towering head frame marking the mine’s entrance and the substantial structures of ore processing facilities. A web of tram tracks, the arteries of the operation, crisscrosses the terrain, connecting the various stages of extraction and refinement. Nearby, power plants stand ready to feed the energy required to drive this relentless engine of industry.
A century later, a modern photograph reveals a scene of profound silence and decay. The once-intricate industrial infrastructure has largely vanished, reclaimed by the desert or salvaged for its materials. What remains is a collection of skeletal ruins, hollowed-out shells succumbing to the elements. The paths of the tramways are now just faint scars on the land. The workshops, once filled with the clang of hammers, are crumbling and roofless. Most prominent are the massive, stubborn foundations of the ore treatment facilities, their thick stone and concrete walls a testament to the immense scale of the machinery they once supported, now standing as silent tombs of a glorious, bygone era. (Author: silvia)
-
OLD MINE VERSUS MODERN MINE 4
A photograph from the late 1800s, looking south towards the Ojuela bridge, reveals the staggering scale of the mining operations at their peak. On the east side of the canyon, a prominent head frame stands sentinel while plumes of steam billow from a powerhouse, speaking to the immense energy being consumed. The western slopes are a hive of industrial activity, densely packed with an array of essential buildings — from administrative offices, and assay facilities, where the ore’s value was determined, to the ever-busy workshops. Further in the background, another head frame marks the entrance to the subterranean labyrinth of stopes and adits, the source of the mine’s vast wealth.
In a contemporary view taken over a century later, the landscape is one of haunting emptiness. The immense industrial infrastructure —the head frames, the powerhouses, and the intricate network of tramways that once ferried ore across the canyon — has almost entirely vanished, dismantled by time and salvage. Only a few stone structures stubbornly survive, yet they are mere shells of their former selves. Roofless, gutted, and exposed to the elements, these dilapidated ruins, devoid of the machinery and life that once filled them, stand as a quiet, somber epilogue, offering only faint echoes of the great mine that once dominated this canyon. (Author: silvia)
-
old shaft in Peña del Hierro (Nerva, Huelva, Spain). The origin of the famous river Tinto is in the vicinity...All this zone is famous because the Astrobiology work performed here. The zone has been considered a "Mars analog" on Earth and the study of extremophile organisms received a lot of attention here. (Author: Cesar M. Salvan)
-
Old vial with rounded pyrope crystals ("Bohemian Garnet") from Zöblitz, Erzgebirge, Saxony, a famous pyrope locality. (Author: Andreas Gerstenberg)
-
Old-style ANSP-label (Author: Andreas Gerstenberg)
-
Older austinite find...most sold as smithsonite. Piece is 10 cm across (Author: Peter Megaw)
-
Olivenite
Christiana Mine, Kamariza Mines, Agios Konstantinos, Lavrion, Attikí, Greece
fov 3 mm (Author: ploum)
-
Olivenite
Christiana mine, Laurion, Attika, Greece
fov 1.5 mm (Author: ploum)
-
Olivenite
Ibiajara, Bahia, Brazil
3.9 x 5.8 cm.
Slender green olivenite crystals to 1 cm in length coated with micro-spheres of cornwallite and malachite on a gossanous matrix. From a new find in 2006. (Author: crosstimber)
-
Olivenite
Laurion, Greece
FOV 10 mm (Author: ploum)
-
Olivenite
Serpieri Mine, Kamariza Mines, Agios Konstantinos, Lavrion, Attikí, Greece
fov 3.5 mm (Author: ploum)
-
Olivenite and Agardite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.0 mm (Autor: ploum) -
Olivenite and Agardite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.1 mm (Autor: ploum) -
Olivenite and azurite
Christiana Mine, Laurion, Greece
fov 9 mm (Author: ploum)
-
Olivenite and Azurite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 3 mm (Autor: ploum) -
Olivenite and Azurite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 8.0 mm (Autor: ploum) -
Olivenite and Calcite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
28mm x 21mm x 16mm (Autor: Heimo Hellwig) -
Olivenite and conichalcite
fov 3 mm
(Author: ploum)
-
Olivenite and Conichalcite
fov 5.3 mm
(Author: ploum)
-
Olivenite and conichalcite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2 mm (Autor: ploum) -
Olivenite and Conichalcite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.8 mm (Autor: ploum) -
Olivenite and Conichalcite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.6 mm (Autor: ploum) -
Olivenite and Conichalcite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.8 mm (Autor: ploum) -
Olivenite and Conichalcite
Mina Hilarion, Zona Hilarion, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.8 mm (Autor: ploum) -
Olivenite and Conichalcite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.8 mm (Autor: ploum) -
Olivenite and Cornwallite
Distrito Ibiajara, Rio do Pires, Bahia, Región Nordeste, Brasil
fov 2.2 mm (Autor: ploum) -
Olivenite and Cornwallite
Distrito Ibiajara, Rio do Pires, Bahia, Región Nordeste, Brasil
fov 2.2 mm (Autor: ploum) -
Olivenite and Cornwallite
Distrito Ibiajara, Rio do Pires, Bahia, Región Nordeste, Brasil
fov 2.6 mm (Autor: ploum) -
Olivenite and Cornwallite
Distrito Ibiajara, Rio do Pires, Bahia, Región Nordeste, Brasil
fov 2.6 mm (Autor: ploum) -
Olivenite and Cornwallite
Distrito Ibiajara, Rio do Pires, Bahia, Región Nordeste, Brasil
fov 2.6 mm (Autor: ploum) -
Olivenite and Quartz
Mina Serpieri, Minas Kamariza, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.2 mm (Autor: ploum) -
Olivenite and Quartz
Mina Serpieri, Minas Kamariza, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.2 mm (Autor: ploum) -
Olivenite and Quartz
Mina Serpieri, Minas Kamariza, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.2 mm (Autor: ploum) -
Olivenite and Quartz
Cornwall, Inglaterra / Reino Unido
(Autor: Jordi Fabre) -
Olivenite from Clara Mine, Black Forest, Germany.
Field of view: 1.6 mm (Author: Rewitzer Christian)
-
Olivenite from Cocotas Mines, Tijola, Granada, Spain.
Field of view: 3.2 mm (Author: Rewitzer Christian)
-
Olivenite on Conichalcite
Mina Hilarion, Zona Hilarion, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 1.8 mm (Autor: ploum) -
Olivenite with azurite
Christiana mine, Laurion, Greece
fov 4 mm (Author: ploum)
-
Olivenite with conichalcite
Christiana mine, Laurion, Greece
fov 4 mm (Author: ploum)
-
Olivenite with conichalcite
Christiana mine, Laurion, Greece
fov 4mm (Author: ploum)
-
Olivenite with conichalcite and azurite
Christiana mine, Laurion, Greece
fov 4 mm (Author: ploum)
-
Olivenite with malachite
Christiana mine, Laurion, Greece
fov 4 mm (Author: ploum)
-
Olivenite xls
Tsumeb, Namibia
Size: Small Cabinet
Specimen: William Pinch Collection
Photo: Jeff Scovil & The RRUFF Project (Author: Pinch Bill)
-
Olivenite, azurite
Christiana Mine, Kamariza Mines, Agios Konstantinos, Lavrion, Attikí, Greece
3 mm (Author: ploum)
-
Olivenite, azurite and conichalcite
Christiana mine, Laurion, Greece
fov 9 mm (Author: ploum)
-
Olivenite, Cornwallite
Mina Gold Hill, Gold Hill, Distrito Gold Hill, Condado Tooele, Utah, USA
FOV = 3.5 mm (Autor: Doug) -
Olivenite, quartz, calcite
Clara Mine, Wolfach, Black Forest, BW, Germany
fov 3mm (Author: ploum)
-
Olivenite, quartz, calcite
Clara Mine, Wolfach, Black Forest, BW, Germany
fov 3 mm (Author: ploum)
-
Olivenite
Clara Mine, Wolfach, Black Forest, Germany
fov 3 mm (Author: ploum)
-
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.7 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.7 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.5 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.5 mm (Autor: ploum) -
Olivenite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.6 mm (Autor: ploum) -
Olivenite
Mina Christiana, Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 2.6 mm (Autor: ploum) -
Olivenite
Mina María Josefa, Rodalquilar, Níjar, Comarca Metropolitana de Almería, Almería, Andalucía, España
FOV 7 mm (Autor: Firmo Espinar) -
Olivenite
Mina Serpieri, Minas Kamariza, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
fov 5.5 mm (Autor: ploum) -
Olivenite
Mina Tsumeb, Tsumeb, Región Otjikoto, Namibia
34mm x 21mm x 25mm (Autor: Heimo Hellwig) -
Olivenite
Mina Majuba Hill, Distrito Antelope, Condado Pershing, Nevada, USA
FOV = 3.4 mm (Autor: Doug) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
FOV = 3.4 mm (Autor: Doug) -
Olivenite
Mina Burrus, Distrito Pyramid, Condado Washoe, Nevada, USA
FOV = 1.7 mm (Autor: Doug) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 2.1 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.8 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 1.55 mm (Autor: ploum) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
fov 2.3 mm (Autor: ploum) -
Olivenite
Mina Milpillas, nivel 992, Cuitaca, Municipio Santa Cruz, Sonora, México
Crystal size: 1.2 × 0.2 cm (Autor: Jordi Fabre) -
Olivenite
Mina Majuba Hill, Distrito Antelope, Condado Pershing, Nevada, USA
5.5 x 3.2 x 2.0 cm (Autor: Michael Shaw) -
Olivenite
Minas Kamariza, Agios Konstantinos, Distrito minero Lavrion, Prefectura Attikí (Attica), Grecia
3,5 x 3,5 cm (Autor: Volkmar Stingl) -
Olivenite
Mina Clara, Valle Rankach, Oberwolfach, Wolfach, Selva Negra, Baden-Württemberg, Alemania
1,5 x 1,3 cm (Autor: Volkmar Stingl) -
Olivenite
Mina Milpillas, nivel 992, Cuitaca, Municipio Santa Cruz, Sonora, México
2.0 x 1.3 cm (Autor: Michael Shaw) -
olivin.jpg (Author: Tobi)
-
Olivine Group (variety peridot)
Pyaung Gaung mine, Bernardmyo village, north of Mogok, Burma (Myanmar).
17 mm. (Author: Ru Smith)
-
Olivine Group (variety peridot)
Pyaung Gaung mine, Bernardmyo village, north of Mogok, Burma (Myanmar).
15 mm. (Author: Ru Smith)
-
Olivine Group (variety peridot)
Pyaung Gaung mine, Bernardmyo village, north of Mogok, Burma (Myanmar).
22 mm long. (Author: Ru Smith)
-
Olivine series, Forsterite var.Peridot with Calcite; Sapat Gali (Soppat), Kohistan, Pakistan.
50x35x33mm, 56g. GN’s collection id 09PKOcm01.
Taken in direct sunlight. Stereo pair. (Author: Gerhard Niklasch)
-
Olivine series, Forsterite var.Peridot with Calcite; Sapat Gali (Soppat), Kohistan, Pakistan.
50x35x33mm, 56g. GN’s collection id 09PKOcm01.
Taken in direct sunlight. Stereo pair. (Author: Gerhard Niklasch)
-
Olivine series, Forsterite var.Peridot with Calcite; Sapat Gali (Soppat), Kohistan, Pakistan.
50x35x33mm, 56g. GN’s collection id 09PKOcm01.
Taken in direct sunlight. (Author: Gerhard Niklasch)
-
Olivine series, Forsterite var.Peridot with Calcite; Sapat Gali (Soppat), Kohistan, Pakistan.
50x35x33mm, 56g. GN’s collection id 09PKOcm01.
Taken in direct sunlight. (Author: Gerhard Niklasch)
-
Olivine, var. peridot, St John’s Island, Egypt, 2 x 1.1 x 0.6 cm (Author: Jim)
-
Ollisdal Geo, Duirinish, Isle of Skye, Scotland, UK
Photo (courtesy of D.I Green) of me trying to get across the steep bit. I retreated as I was in danger of getting wet and it was a long walk back to the car ! Photo taken same day as the previous stilbite specimen was collected in May 1996. (Author: Mike Wood)
-
Olmiite
N’Chwaning II Mine, Kuruman, N. Cape Prov., South Africa
4.0 x 6.0 cm
Drusy, colorless calcite with a 1.9 cm group of lustrous, peach-colored olmiite and small white spherical masses of oyelite. (Author: crosstimber)
-
Olmiite
N’Chwaning Mine, Kalahari Manganese Fields, Northern Cape Province, South Africa
2.5 x 2.4 cm (Author: Don Lum)
-
Olmiite
N’Chwaning Mine, Kalahari Manganese Fields, Northern Cape Province, South Africa
2.5 x 2.4 cm (Author: Don Lum)
-
Olmiite with Bultfonteinite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
100 x 40 x 20 mm (Autor: Rob Schnerr) -
Olmiite with Bultfonteinite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
100 x 40 x 20 mm (Autor: Rob Schnerr) -
Olmiite with Bultfonteinite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
100 x 40 x 20 mm (Autor: Rob Schnerr) -
Olmiite, Calcite
N’Chwaning II Mine, Kalahari Manganese Fields, South Africa
4.2 x 3.3 cm (Author: Don Lum)
-
Olmiite, Calcite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
30mm x 30mm x 20mm (Autor: Don Lum) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
1.8 x 2.0 cm (Autor: crosstimber) -
Olmiite
Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
4.1 cm (Autor: Nunzio) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
3.6 x 4.7 cm (Autor: crosstimber) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
5.1 x 3.7 cm (Autor: am mizunaka) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
11.5 x 7.5 cm (Autor: am mizunaka) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
40 x 33 mm (Autor: Sante Celiberti) -
Olmiite
Mina N'Chwaning II, Zona minera N'Chwaning, Kuruman, Kalahari manganese field (KMF), Provincia Septentrional del Cabo, Sudáfrica
26 x 23 x 21 mm (Autor: TamaHiguchi) -
Olshanskyite and Roweite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
5.4 x 4.1 cm (Autor: Michael Shaw) -
Olshanskyite with Andradite, Wurtzite and Galena
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
103 x 100 x 57 mm (Autor: GneissWare) -
Olshanskyite with Andradite, Wurtzite and Galena
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
103 x 100 x 57 mm (Autor: GneissWare) -
Olshanskyite with Roweite and Andradite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
Specimen size: 7.5 × 4.6 × 3.4 cm (Autor: Jordi Fabre) -
olshanskyite xrd.jpg (Author: Cesar M. Salvan)
-
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
FOV 1.5 cm (Autor: Cesar M. Salvan) -
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
FOV 1.5 cm (Autor: Cesar M. Salvan) -
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
FOV 1.5 cm (Autor: Cesar M. Salvan) -
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
FOV 1.5 cm (Autor: Cesar M. Salvan) -
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
3,5 x 3 cm (Autor: Volkmar Stingl) -
Olshanskyite
Mina Shijiangshan, Aldea Shijiangshan, Yinwu, Linxi, Ulanhad League, Región Autónoma Mongolia Interior, China
3,5 x 3 cm (Autor: Volkmar Stingl) -
olv01.jpg (Author: Tobi)
-
olvXL1.jpg (Author: Tobi)
-
olvXL2.jpg (Author: Tobi)
-
olvXL3.jpg (Author: Tobi)
-
Omphacite
Silberbach, Hof, Bavaria, Germany
sample width: 5 cm
Old material with intergrown pyrope crystals. Ex Bergakademie Freiberg. Type locality. (Author: Andreas Gerstenberg)
-
Omphacite
Bric Vert, Quincinetto, Provincia Ciudad metropolitana de Turín, Piamonte (Piemonte), Italia
92 x 73 mm (Autor: Sante Celiberti) -
Omphacite
Bric Vert, Quincinetto, Provincia Ciudad metropolitana de Turín, Piamonte (Piemonte), Italia
92 x 73 mm (Autor: Sante Celiberti) -
On a base of cubic Fluorite of honey yellow color, very bright and partially covered by little crystals of Barite, grows the Calcite crystals, doubly terminated and with dominant very acute scalenohedron faces.
Moscona Mine (Author: Joan Rosell)
-
On a matrix of cleavelandite stands a stunning prismatic, peach coloured topaz measuring 28mm x 29mm and 40mm tall. from Pakistan, Northern Areas, Skardu, Yunu, Shigar Valley
Size 100 x 50 x 58 mm (Author: olelukoe)
-
On my way back to my bivi place, crossing the Lairig Ghru for the second time. At least the cloud has gone, revealing a much greener vista, looking south down the valley where the river Dee flows. (Author: Mike Wood)
-
On my way home on a remote farm road. (Author: Pierre Joubert)
-
On my way up. (Author: Pierre Joubert)
-
On occasion I have been known to build gardens and this stuff came in by the truckload so I used it everywhere. The slabs I cut this from are from India. Im not 100% on what it is, I thought maybe Manganese? (Author: nurbo)
-
On our way to dig for crystals, we encounter scenery like this. (Author: Pierre Joubert)
-
On the other side is a vug with a couple of Aragonites to 0.9 cm in it. (Author: nurbo)
-
On the road back home; mountain scenery somewhere just outside Worcester(not UK but SA) (Author: Pierre Joubert)
-
ON THE ROAD TO THE MILPILLAS MINE
LOCATION
The Milpillas Copper Mine, also known as La Parreña Mine, is located in the Santa Cruz Municipality of Sonora. Sonora is a large state located in northwestern Mexico. It borders the U.S. states of Arizona and New Mexico to the north, the Mexican states of Baja California to the west, Chihuahua to the east, and Sinaloa to the south. Its western edge lies along the Gulf of California (Sea of Cortez). Much of the state is covered by the Sonoran Desert.
The Milpillas Copper Mine is located approximately 40 kilometers (25 miles) south of the US-Mexico border, positioning it as an integral part of a larger, cross-border mining region deeply connected to Arizona’s long-standing mining industry. Specifically, it lies about 60 kilometers (37 miles) southwest of Bisbee, Arizona, a town renowned for its Copper mining history. Tucson, a significant city in Southern Arizona, is roughly 188 kilometers (117 miles) to the north-northwest.
Closer to home, the Milpillas mine is situated about 20 kilometers northwest of Cananea, a significant Mexican mining center with a population of 30,000. Cananea’s economy heavily relies on the large Buena Vista del Cobre mine. The closest settlement to the Milpillas Mine (La Parreña) is the small village of Milpillas, with just over 170 residents. Other nearby communities, such as Cuitaca and Vicente Guerrero, underscore the area’s rural and mining-focused character. Access to the Milpillas site from Cananea involves navigating a mix of paved, secondary, and unpaved mining roads.
BRIEF HISTORY
The Milpillas Mine in Sonora, Mexico, discovered in 1978, faced an uphill battle for development. For decades, it lay dormant, hampered by low Copper prices and significant geological hurdles, most notably being buried beneath 250 meters of water-saturated alluvium. However, extensive exploration efforts by Minera Cuicuilco and Industrias Peñoles between the 1980s and 2001 ultimately confirmed substantial high-grade Copper reserves.
Underground mining operations for Copper finally began in 2006. Milpillas quickly gained fame not just for its Copper, but also for its world-class mineral specimens, particularly the striking "electric blue" Azurite crystals, Malachite, and Cuprite found in its supergene enrichment zones. Despite its geological riches, operations were indefinitely suspended in 2020 due to high costs and falling Copper prices. Fortunately, mining activities resumed in June 2022 and are ongoing.
Geological Setting and Mineralization
The Milpillas mine is discreetly situated within the Cuitaca Graben, a prominent north-south trending extensional basin within Sonora’s Basin and Range province. The valuable Copper deposit was initially concealed beneath younger layers of Tertiary gravels and Quaternary alluvium. The underlying geology primarily consists of volcaniclastic rocks from the Laramide Mesa Formation and older Jurassic Henrietta Formation, which have been intruded by monzonitic to quartz monzonitic porphyry stocks. High-grade supergene enrichment, a process that generated the mine’s renowned Azurite, Malachite, and other secondary Copper minerals, occurred within these host rocks at depths ranging from 150 to 750 meters below the surface.
Climate, Flora, and Fauna
Milpillas experiences Sonora’s characteristic arid to semi-arid climate, set within a Basin and Range topography of alternating mountain ranges and expansive valleys. While higher elevations near Cananea support scattered pine-oak forests, Milpillas’ immediate vicinity is a typical desert environment at lower elevations. The flora is well-adapted to drought, including various cacti (such as nopal and barrel cactus), mesquite trees, creosote bush, and resilient desert grasses and shrubs. The fauna, equally suited to these conditions, includes coyotes, diverse rodents, and numerous reptile species, such as snakes and lizards. (Author: silvia)
-
On the way back home, Riana took this picture while I was driving. (Author: Pierre Joubert)
-
On the way back. (Author: Pierre Joubert)
-
On the way back. (Author: Pierre Joubert)
-
Once on the glacier (Mer de Glace) it is several kilometres walk to some more ladders, to get off the glacier and up the path to the Courvercle Hut below the Aiguille du Moine. The glacier is ’dry’ this low down at this time of year so is mostly easy to walk on - you can see the objective dangers (crevasses) and avoid them. A refreshing cold breeze blows down the valley, otherwise it would be hot under the summer sun.
Photo scanned from slide. (Author: Mike Wood)
-
One day at the mine, blue sky, breezy, and sunshine. (Author: vic rzonca)
-
One half of my mineral display.
Cabinet is 80cm x 50cm.
Six (2W) LED (4100K) strips. (Author: Mike Wood)
-
One more for the guys who toiled on the square set and single jack. (Author: vic rzonca)
-
One of about 3 pockets that I found on the day. (Author: Pierre Joubert)
-
One of my amethists from the railroad (it was a present from Joan Carles, the photo is not good, it was made by me, sorry :( , it has 2cm width) (Author: Sergio)
-
One of my collecting chums with a large calcite boat. (Author: vic rzonca)
-
One of my favorites. 2 dark red / cranberry tourmalines on lepidolite matrix. Both of these have gemmy tops, and perfect terminations. The smaller xtal has one repair. This piece is from Xanda Mine, Virgem de Lapa, Minas Gerias Brazil. Dimensions are 8.9 x 5.1 x 5 cm and weight is 105 grams. One picture is in the case with backlight. (Author: VRigatti)
-
One of my favourite wild flowers; a vine with beautiful flowers. (Author: Pierre Joubert)
-
One of my favourites, I call this the "Lighthouse". (Author: Gail)
-
One of my showcases of Tuscan minerals, about to collapse. (Author: Sante Celiberti)
-
One of my showcases of world-wide minerals. Specimens don’t make their figure because of the overcrowding. (Author: Sante Celiberti)
-
One of our 2 RPS’s (royal pavement specials), Yogi (reminding one of Yogi bear, with his short ear stubs), who was rescued about ten years ago, from a squatter camp after both his ears had been cut off. He is a very happy dog and just as addicted to the mountains, just like us. (Author: Pierre Joubert)
-
One of the areas where I dug. (Author: Pierre Joubert)
-
One of the cleaned specimens; sorry no size. (Author: Pierre Joubert)
-
One of the excelent photos of Christian Rewitzer. An Anatase from Adra, Almería, Spain. (Author: Rewitzer Christian)
-
One of the glass shelfs of the Tsumeb collection. More pictures in the next post (Author: Herman van Dennebroek)
-
One of the many small butterflies of the Western Cape mountains. (Author: Pierre Joubert)
-
One of the nicer specimens of the find of Rhodochrosites and Kentrolites from Rivet Quarry, Peyrebrune, France. (Author: Jordi Fabre)
-
One of the railroad new outcrops. Left: medium to coarse grained leucogranite which has yielded crystallized minerals. Lower right: Miocene arkoses. Upper right: Miocene basalt lava flows, without mineralogical interest. (Author: davidsoler)
-
One of the shelves in the Waddell Case, north wall. (Author: Ed Huskinson)
-
One of the smaller crystals (~ 15 mm) that shows how the duftite is intergrown with the calcite. (Author: Tobi)
-
One of the specimens I removed. (Author: Pierre Joubert)
-
One of the specimens I removed. (Author: Pierre Joubert)
-
One of the specimens I removed. (Author: Pierre Joubert)
-
One of the specimens she removed. (Author: Pierre Joubert)
-
One of the steepest parts of the road in the distance. Here is where we leave the valley floor. (Author: John S. White)
-
One of the work areas. The larger pocket zone is low on the face, but many smaller, 10 cm. holes are above. The floor of the bench is the bottom of the formation and is barren. (Author: vic rzonca)
-
One of these wonderful Chalcopyrites with Siderite
Specimen Size: 12.5 × 6.9 × 5.3 cm.
Main crystal size: 1 × 0.9 cm.
Locality: Hezhang County, Bijie Prefecture, Guangxi, China
Mined in 2012 (Author: Jordi Fabre)
-
One of twenty large boulders (Author: Glenn Rhein)
-
One side of amethyst I acquired while there. It is 6.5 cm across. (Author: John S. White)
-
One we found last weekend with very small green facet grade on the right side..not enough to cut anything..(we didn’t find much this day as we were trying some sample digging) (Author: Jason)
-
Oneillite
Cantera Poudrette, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canadá
FOV = 4mm (Autor: Doug) -
Onoratoite
Le Cetine Mine, Chiusdino, Siena, Tuscany, Italy
fov 1.5 mm (Author: Rewitzer Christian)
-
Opal
Erongo Mountain, Namibia
2cm x 1cm x .2cm
Opal (UV light) (Author: Mark Ost)
-
Opal
Erongo Mountain, Namibia
2cm x 1cm x .2 cm
Opal (indirect sunlight) (Author: Mark Ost)
-
Opal
Erongo Mountain, Namibia
2cm x 1 cm x .2 cm
Opal (tungsten light) (Author: Mark Ost)
-
Opal
Fornaccia, Fornovolasco, Vergemoli, Apuan Alps, Lucca Province, Tuscany, Italy
6.84 mm blue-light Opal concrections (Author: Matteo_Chinellato)
-
Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
-
Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
-
Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
-
Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
-
Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
-
Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
-
Opal
Queensland, Australia
15 x 6.3 x 5 cm
Cutting boulder opal can be really messy with the ironstone turning to mud under the grinding wheels. (Author: Don Lum)
-
Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
-
Opal
Queensland, Australia
15 x 6.3 x 5 cm
ex-Bill Rudner.
Way back when, a person could stop by Chris Wright’s place in Hot Springs and go through a bin with boulder opal rough. It was sold by the pound. That was okay because about 99.99% of it was ironstone matrix. I suspect that possibly as many as a dozen people have high-graded it before it got to the bin but every now and again Chris would put back a piece for that special person. Unfortunately, more often than not, I was usually not that person. (Author: Don Lum)
Acceso a Foro FMF
Guía de uso de Galería FMF
