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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)
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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)
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Olivine, var. peridot, St John’s Island, Egypt, 2 x 1.1 x 0.6 cm (Author: Jim)
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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)
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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)
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Olmiite
N’Chwaning Mine, Kalahari Manganese Fields, Northern Cape Province, South Africa
2.5 x 2.4 cm (Author: Don Lum)
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Olmiite
N’Chwaning Mine, Kalahari Manganese Fields, Northern Cape Province, South Africa
2.5 x 2.4 cm (Author: Don Lum)
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Olmiite with Bultfonteinite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
100 x 40 x 20 mm (Author: Rob Schnerr) -
Olmiite with Bultfonteinite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
100 x 40 x 20 mm (Author: Rob Schnerr) -
Olmiite with Bultfonteinite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
100 x 40 x 20 mm (Author: Rob Schnerr) -
Olmiite, Calcite
N’Chwaning II Mine, Kalahari Manganese Fields, South Africa
4.2 x 3.3 cm (Author: Don Lum)
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Olmiite, Calcite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
30mm x 30mm x 20mm (Author: Don Lum) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
1.8 x 2.0 cm (Author: crosstimber) -
Olmiite
N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
4.1 cm (Author: Nunzio) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
3.6 x 4.7 cm (Author: crosstimber) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
5.1 x 3.7 cm (Author: am mizunaka) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
11.5 x 7.5 cm (Author: am mizunaka) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
40 x 33 mm (Author: Sante Celiberti) -
Olmiite
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province, South Africa
26 x 23 x 21 mm (Author: TamaHiguchi) -
Olshanskyite and Roweite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
5.4 x 4.1 cm (Author: Michael Shaw) -
Olshanskyite with Andradite, Wurtzite and Galena
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
103 x 100 x 57 mm (Author: GneissWare) -
Olshanskyite with Andradite, Wurtzite and Galena
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
103 x 100 x 57 mm (Author: GneissWare) -
Olshanskyite with Roweite and Andradite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
Specimen size: 7.5 × 4.6 × 3.4 cm (Author: Jordi Fabre) -
olshanskyite xrd.jpg (Author: Cesar M. Salvan)
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Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
FOV 1.5 cm (Author: Cesar M. Salvan) -
Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
FOV 1.5 cm (Author: Cesar M. Salvan) -
Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
FOV 1.5 cm (Author: Cesar M. Salvan) -
Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
FOV 1.5 cm (Author: Cesar M. Salvan) -
Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
3,5 x 3 cm (Author: Volkmar Stingl) -
Olshanskyite
Shijiangshan Mine, Shijiangshan village, Yinwu, Linxi, Ulanhad League, Inner Mongolia Autonomous Region, China
3,5 x 3 cm (Author: Volkmar Stingl) -
olv01.jpg (Author: Tobi)
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olvXL1.jpg (Author: Tobi)
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olvXL2.jpg (Author: Tobi)
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olvXL3.jpg (Author: Tobi)
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Omphacite
Silberbach, Hof, Bavaria, Germany
sample width: 5 cm
Old material with intergrown pyrope crystals. Ex Bergakademie Freiberg. Type locality. (Author: Andreas Gerstenberg)
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Omphacite
Bric Vert, Quincinetto, Metropolitan City of Turin Province, Piedmont (Piemonte), Italy
92 x 73 mm (Author: Sante Celiberti) -
Omphacite
Bric Vert, Quincinetto, Metropolitan City of Turin Province, Piedmont (Piemonte), Italy
92 x 73 mm (Author: 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)
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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)
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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)
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On my way home on a remote farm road. (Author: Pierre Joubert)
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On my way up. (Author: Pierre Joubert)
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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)
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On our way to dig for crystals, we encounter scenery like this. (Author: Pierre Joubert)
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On the other side is a vug with a couple of Aragonites to 0.9 cm in it. (Author: nurbo)
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On the road back home; mountain scenery somewhere just outside Worcester(not UK but SA) (Author: Pierre Joubert)
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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)
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On the way back home, Riana took this picture while I was driving. (Author: Pierre Joubert)
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On the way back. (Author: Pierre Joubert)
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On the way back. (Author: Pierre Joubert)
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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)
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One day at the mine, blue sky, breezy, and sunshine. (Author: vic rzonca)
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One half of my mineral display.
Cabinet is 80cm x 50cm.
Six (2W) LED (4100K) strips. (Author: Mike Wood)
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One more for the guys who toiled on the square set and single jack. (Author: vic rzonca)
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One of about 3 pockets that I found on the day. (Author: Pierre Joubert)
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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)
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One of my collecting chums with a large calcite boat. (Author: vic rzonca)
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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)
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One of my favourite wild flowers; a vine with beautiful flowers. (Author: Pierre Joubert)
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One of my favourites, I call this the "Lighthouse". (Author: Gail)
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One of my showcases of Tuscan minerals, about to collapse. (Author: Sante Celiberti)
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One of my showcases of world-wide minerals. Specimens don’t make their figure because of the overcrowding. (Author: Sante Celiberti)
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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)
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One of the areas where I dug. (Author: Pierre Joubert)
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One of the cleaned specimens; sorry no size. (Author: Pierre Joubert)
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One of the excelent photos of Christian Rewitzer. An Anatase from Adra, Almería, Spain. (Author: Rewitzer Christian)
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One of the glass shelfs of the Tsumeb collection. More pictures in the next post (Author: Herman van Dennebroek)
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One of the many small butterflies of the Western Cape mountains. (Author: Pierre Joubert)
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One of the nicer specimens of the find of Rhodochrosites and Kentrolites from Rivet Quarry, Peyrebrune, France. (Author: Jordi Fabre)
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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)
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One of the shelves in the Waddell Case, north wall. (Author: Ed Huskinson)
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One of the smaller crystals (~ 15 mm) that shows how the duftite is intergrown with the calcite. (Author: Tobi)
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One of the specimens I removed. (Author: Pierre Joubert)
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One of the specimens I removed. (Author: Pierre Joubert)
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One of the specimens I removed. (Author: Pierre Joubert)
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One of the specimens she removed. (Author: Pierre Joubert)
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One of the steepest parts of the road in the distance. Here is where we leave the valley floor. (Author: John S. White)
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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)
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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)
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One of twenty large boulders (Author: Glenn Rhein)
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One side of amethyst I acquired while there. It is 6.5 cm across. (Author: John S. White)
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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)
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Oneillite
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
FOV = 4mm (Author: Doug) -
Only this needs to be changed (Author: mineralenzo)
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Onoratoite
Le Cetine Mine, Chiusdino, Siena, Tuscany, Italy
fov 1.5 mm (Author: Rewitzer Christian)
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Opal
Erongo Mountain, Namibia
2cm x 1cm x .2cm
Opal (UV light) (Author: Mark Ost)
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Opal
Erongo Mountain, Namibia
2cm x 1cm x .2 cm
Opal (indirect sunlight) (Author: Mark Ost)
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Opal
Erongo Mountain, Namibia
2cm x 1 cm x .2 cm
Opal (tungsten light) (Author: Mark Ost)
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Opal
Fornaccia, Fornovolasco, Vergemoli, Apuan Alps, Lucca Province, Tuscany, Italy
6.84 mm blue-light Opal concrections (Author: Matteo_Chinellato)
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Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
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Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
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Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
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Opal
Koroit, Queensland, Australia
6.8 x 4.1 cm and 6.2 x 2.8 cm (Author: Don Lum)
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Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
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Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
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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)
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Opal
Queensland, Australia
15 x 6.3 x 5 cm (Author: Don Lum)
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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)
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Opal
Quilpie, Queensland, Australia
4.2 x 3.9 cm (Author: Don Lum)
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Opal
Quilpie, Queensland, Australia
4.2 x 3.9 cm
Boulder Opal (Author: Don Lum)
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Opal
Quilpie, Queensland, Australia
4.2 x 3.9 cm
Boulder Opal (Author: Don Lum)
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Opal
Unknown location in Mexico
1cm x .5cm x1cm
Opal (UV light) (Author: Mark Ost)
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Opal
Unknown location in Mexico
1cm x .5 cmx 1cm
Opal (indirect sunlight) (Author: Mark Ost)
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Opal
Unknown location in Mexico
1cm x .5 cm x 1cm
Opal (tungsten light) (Author: Mark Ost)
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Opal
Yowah, Queensland, Australia
6.5 x 3.5 cm
Yowah Nut (Author: Don Lum)
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Opal
Yowah, Queensland, Australia
6.5 x 3.5 cm
Yowah Nut (Author: Don Lum)
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Opal
Yowah, Queensland, Australia
6.5 x 4 cm
Yowah Nut (Author: Don Lum)
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Opal
Yowah, Queensland, Australia
6.5 x 4 cm
Yowah Nut (Author: Don Lum)
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Opal (Precious Opal)
Quilpie, Quilpie Shire, Queensland, Australia
85 x 50 x 45 mm (Author: Rob Schnerr) -
Opal (var. hyalite), Schorl (Tourmaline Group), Quartz (var. smokey)
Erongo Region, Namibia
50mm X 37mm X 37mm (Author: steven calamuci)Opal (var. hyalite), Schorl (Tourmaline Group), Quartz (var. smokey)
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Opal (variety fiorite)
Castel del Piano (Amiata Mountain), Grosseto Province, Tuscany, Italy
58 x 18 mm (Author: Sante Celiberti) -
Opal (variety fiorite)
Castel del Piano (Amiata Mountain), Grosseto Province, Tuscany, Italy
17 x 8 cm (Author: Sante Celiberti) -
Opal (variety Fire Opal)
San Juan del Río, Queretaro, Mexico
8 x 4 cm (Author: Volkmar Stingl) -
Opal (variety fire opal)
Queretaro, Mexico
3 x 2 cm (Author: Volkmar Stingl) -
Opal (variety fire opal)
Magdalena, Municipio Magdalena, Jalisco, Mexico
2 x 1,5 cm (Author: Volkmar Stingl) -
Opal (variety forcherite)
Breitenau, Hochlantsch, Bruck-Mürzzuschlag District, Styria/Steiermark, Austria
3,5 x 2 cm (Author: Volkmar Stingl) -
Opal (variety Hyalite)
Square Top Mt., Queensland, Australia
5.5x4.5 cm (Author: Greg Lilly)
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Opal (variety hyalite) on Fluorite
Erongo Mountain, Usakos, Erongo Region, Namibia
94mm x 51mm x 68mm (Author: Heimo Hellwig)Opal (variety hyalite) on Fluorite
Erongo Mountain, Usakos, Erongo Region, Na -
Opal (variety hyalite) on Fluorite
Erongo Mountain, Usakos, Erongo Region, Namibia
94mm x 51mm x 68mm (Author: Heimo Hellwig)Opal (variety hyalite) on Fluorite
Erongo Mountain, Usakos, Erongo Region, Na -
Opal (variety hyalite) on smoky quartz.
Erongo mountains; Namibia
60 x 42 x 24 mm (Author: Pierre Joubert)
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Opal (variety hyalite) on smoky quartz.
Erongo mountains; Namibia
60 x 42 x 24 mm
The hyalite opal (32 x 22 mm) has an even better colour in person, very much like jelly. (Author: Pierre Joubert)
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Opal (variety hyalite) with Aragonite
Tarcal, Eperjes-Tokaj Mountains, Borsod-Abaúj-Zemplén, Hungary
Specimen size: 6.6 × 3.6 × 3.8 cm (Author: Jordi Fabre)Opal (variety hyalite) with Aragonite
Tarcal, Eperjes-Tokaj Mountains, Borsod-Abaúj-Zemplén, -
Opal (variety hyalite), Chalcedony and Quartz
Monok, Zemplén Mountains, Szerencs District, Borsod-Abaúj-Zemplén, Hungary
Detail. FOV 10mm. (Author: Firmo Espinar) -
Opal (variety hyalite), Chalcedony and Quartz
Monok, Zemplén Mountains, Szerencs District, Borsod-Abaúj-Zemplén, Hungary
63 mm x 52 mm x 50 mm (Author: Firmo Espinar) -
Opal (variety hyalite), Chalcedony and Quartz
Monok, Zemplén Mountains, Szerencs District, Borsod-Abaúj-Zemplén, Hungary
63 mm x 52 mm x 50 mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
crystal : 3 cm (Author: Benj) -
Opal (variety hyalite)
Zacatecas, Mexico
FOV 8 mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
23mm x 22mm x 15mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
23mm x 22mm x 15mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
23mm x 22mm x 15mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
Detail FOV=11 mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
25mm x 24mm x 15mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Zacatecas, Mexico
25mm x 24mm x 15mm (Author: Firmo Espinar) -
Opal (variety hyalite)
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
5 x 3 cm (Author: Volkmar Stingl) -
Opal (variety hyalite)
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
5 x 3 cm (Author: Volkmar Stingl) -
Opal (variety hyalite)
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
4 x 3,5 cm (Author: Volkmar Stingl) -
Opal (variety hydrophane)
Tsehay Mewcha, Wegeltena, Delanta District, Semien Wollo Zone (North Wollo Zone), Amhara Region, Ethiopia
1,3 x 1 cm (Author: Volkmar Stingl) -
Opal (variety hydrophane)
Tsehay Mewcha, Wegeltena, Delanta District, Semien Wollo Zone (North Wollo Zone), Amhara Region, Ethiopia
1,3 x 1 cm (Author: Volkmar Stingl) -
Opal (variety menilite)
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
34 mm x 52 mm x 20 mm (Author: Firmo Espinar) -
Opal (variety menilite)
Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
75 mm x 50 mm x 18 mm (Author: Firmo Espinar) -
Opal (variety menilite)
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
62 mm x 26 mm x 9 mm (Author: Firmo Espinar) -
Opal from Pedro II, Piauí, Brasil
11,0 cm X 4,5 cm X 6,5 cm (Author: silvio steinhaus)
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Opal on Phillipsite
Roca-Neyra, Perrier, Issoire District, Puy-de-Dôme Department, Auvergne-Rhône-Alpes, France
fov 1.70 mm (Author: ploum) -
Opal pseudomorph after Ikaite
White Chalk Cliffs, New South Wales, Australia
7.0 x 6.7 x 4.2 cm
ex-Jim Clark (Author: Don Lum)
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Opal pseudomorph after Ikaite
White Chalk Cliffs, New South Wales, Australia
7.0 x 6.7 x 4.2 cm
ex-Jim Clark (Author: Don Lum)
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Opal pseudomorph after Ikaite
White Chalk Cliffs, New South Wales, Australia
7.0 x 6.7 x 4.2 cm
ex-Jim Clark (Author: Don Lum)
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Opal var hyalite
Zacatecas, Mexico
4.1 x 2.8 x 2.1 cm (Author: Don Lum) -
Opal var Shell Opal
Australia
11 x 7.5 cm
Belemnite (Author: Don Lum)
-
Opal var Shell Opal
Australia
11 x 7.5 cm
Belemnite (Author: Don Lum)
-
Opal var Shell Opal
Australia
11 x 7.5 cm
Belemnite (Author: Don Lum)
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Opal var. hyalite
Valec, Karlovy Vary Region, Bohemia, Czech Republic
7.0 x 8.1 cm
Glassy botryoidal hyalite opal on a shard of matrix. The opal exhibits a strong green fluorescence under SW light. (Author: crosstimber)
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Opal var. menilite
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
3.0 cm x 4.9 cm (Author: Michael Shaw) -
Opal with Orpiment inclusions (variety forcherite)
Holzbrücken, Ingering, Knittelfeld, Murtal District, Styria/Steiermark, Austria
8,5 x 6 cm (Author: Volkmar Stingl) -
Opal with Orpiment inclusions (variety forcherite)
Holzbrücken, Ingering, Knittelfeld, Murtal District, Styria/Steiermark, Austria
8,5 x 6 cm (Author: Volkmar Stingl) -
Opal,
Quilpie, Quilpie Shire, Queensland, Australia
10 x 5 cm (Author: Sante Celiberti) -
Opal-(AN)
Tepetate, Villa de Arriaga Municipality, San Luis Potosí, Mexico
5.0 x 5.2 cm (Author: crosstimber) -
Opal-(AN)
Tepetate, Villa de Arriaga Municipality, San Luis Potosí, Mexico
5.0 x 5.2 cm (Author: crosstimber) -
Opal-AN (variety hyalite) with Fluorapatite (variety staffelite)
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
75 x 48 x 55 mm (Author: Rob Schnerr)Opal-AN (variety hyalite) with Fluorapatite (variety staffelite)
Valeč, Doupov, Karlovy V -
Opal-AN (variety hyalite)
Zacatecas (City), Municipio Zacatecas, Zacatecas, Mexico
45 mm x 21 mm x 17 mm (Author: Firmo Espinar) -
Opal-AN (variety hyalite)
Zacatecas (City), Municipio Zacatecas, Zacatecas, Mexico
45 mm x 21 mm x 17 mm (Author: Firmo Espinar) -
Opal-AN
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
6.1 x 4.3 x 3.8 cm (Author: Don Lum) -
Opal-AN
Valeč, Doupov, Karlovy Vary Region, Bohemia, Czech Republic
6.1 x 4.3 x 3.8 cm (Author: Don Lum) -
Opal-AN
Kopasz Hill Quarry, Tarcal, Eperjes-Tokaj Mountains, Borsod-Abaúj-Zemplén, Hungary
2.0 cm x 2.9 cm (Author: Michael Shaw) -
Opal-AN
Castel del Piano (Amiata Mountain), Grosseto Province, Tuscany, Italy
10,5 x 7,5 cm (Author: Sante Celiberti) -
Opal-AN
Castel del Piano (Amiata Mountain), Grosseto Province, Tuscany, Italy
10,5 x 7,5 cm (Author: Sante Celiberti) -
Opal-AN
Tarcal, Eperjes-Tokaj Mountains, Borsod-Abaúj-Zemplén, Hungary
35 x 25 mm (Author: Sante Celiberti) -
Opal-CT (variety lussatite) after fossil (Helix ramondi)
Les Rois Mine, Mur-sur-Allier, Pont-du-Château, Clermont-Ferrand District, Puy-de-Dôme Department, Auvergne-Rhône-Alpes, France
92 mm x 45 mm x 39 mm (Author: Don Lum) -
Opal-CT (variety lussatite)
Lussat, Aigueperse, Riom, Puy-de-Dôme Department, Auvergne-Rhône-Alpes, France
12 x 10 x 10 mm (Author: Rob Schnerr) -
Opal. A kind of Chrystmas opals (lol). Agramón. Albacete. Castilla La Mancha. Spain. 7 cm and 4 cm (Author: nimfiara)
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Opal. Agramón. Albacete. Castilla La Mancha. Spain. 8 cm (Author: nimfiara)
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Opal. Cabo de Gata. Almería. Andalusia. Spain. 8 cm (Author: nimfiara)
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Opal. Cabo de Gata. Almeria. Andalusia. Spain. 7 cm (Author: nimfiara)
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Opal. Cabo de Gata. Almería. Andalusia. Spain. 7 cm (Author: nimfiara)
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Opal. Galera. Granada. Andalusia. Spain. 6 cm. (Author: nimfiara)
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Opal
from Virgin Valley, Nevada,USA
1.0X0.9X0.3 cubic cm (Author: pro_duo)
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Opal
Mina La Carbonera, Tequisquiapán, Querétaro, Mexico
84x82x68mm (Author: Carlos M.)
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Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
33mm x 9mm x 8mm (Author: Firmo Espinar) -
Opal
Zacatecas, Mexico
FOV of 34.16mm (Author: ofarcis) -
Opal
Zacatecas, Mexico
FOV of 34.16mm (Author: ofarcis) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
106mm x 55mm x 12mm (Author: Firmo Espinar) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
43 x 36 mm (Author: Sante Celiberti) -
Opal
Caux, Pézenas Canton, Béziers District, Hérault, Occitanie, France
fov 6 mm (Author: ploum) -
Opal
Durango, Mexico
(Author: Gail) -
Opal
Durango, Mexico
25mm (Author: Gail) -
Opal
Caux, Pézenas Canton, Béziers District, Hérault, Occitanie, France
fov 5.5 mm (Author: ploum) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
43 x 36 mm (Author: Sante Celiberti) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
38mm x 30mm x 10mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
26 mm x 15 mm x 8 mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
28mm x 13mm x 6mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
32mm x 35mm x 8mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
49mm x 40mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
14mm x 43mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
46mm x 48mm x 19mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
46mm x 48mm x 19mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
16mm x 31mm x 10mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
56mm x 54mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
32mm x 26mm x 15mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
68mm x 40mm x 13mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
68mm x 40mm x 13mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
17mm x 43mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
17mm x 43mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
40mm x 68mm x 15mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
28mm x 33mm x 11mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
28mm x 40mm x 20mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
58mm x 35mm x 22mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
60mm x 42mm x 30mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
17mm x 25mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
18mm x 26mm x 12mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
16mm x 34mm x 11mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
(Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
(Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
(Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
(Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
15mm x 30mm x 9mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
26mm x 54mm x 15mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
28mm x 58mm x 17mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
30mm x 80mm x 10mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
14mm x 44mm x 11mm (Author: Firmo Espinar) -
Opal
Yita Ridge roughs, Menz and Gishe (Menz na Gishe), Amhara Region, Ethiopia
87 mm x 84 mm x 75 mm (Author: Don Lum) -
Opal
Yita Ridge roughs, Menz and Gishe (Menz na Gishe), Amhara Region, Ethiopia
87 mm x 84 mm x 75 mm (Author: Don Lum) -
Opal
Yita Ridge roughs, Menz and Gishe (Menz na Gishe), Amhara Region, Ethiopia
87 mm x 84 mm x 75 mm (Author: Don Lum) -
Opal
Yita Ridge roughs, Menz and Gishe (Menz na Gishe), Amhara Region, Ethiopia
87 mm x 84 mm x 75 mm (Author: Don Lum) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
3.75 x 3.25 x 1.5 inches (Author: Chris Wentzell) -
Opal
Monti Pelati, Bettolino, Baldissero Canavese, Metropolitan City of Turin Province, Piedmont (Piemonte), Italy
68 x 56 mm (Author: Sante Celiberti) -
Opal
Debub Wollo Zone (South Wollo Zone), Amhara Region, Ethiopia
1 cm each one (Author: Tobi) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
Specimen size 9 cm (Author: Tobi) -
Opal
Sorteo mining group, El Cintado, Cáceres city, Comarca de Cáceres, Cáceres, Extremadura, Spain
42mm x 42mm x 35mm (Author: Firmo Espinar) -
Opal
Coober Pedy, Central North, South Australia, Australia
Vial 35 x 17 mm (Author: Volkmar Stingl) -
Opal
Tsehay Mewcha, Wegeltena, Delanta District, Semien Wollo Zone (North Wollo Zone), Amhara Region, Ethiopia
16 mm x 10 mm x 6 mm (Author: Firmo Espinar) -
Opal
Opal outcrop, Camarillas reservoir, Agramón, Hellín, Comarca Campos de Hellín, Albacete, Castilla-La Mancha, Spain
47 mm x 41 mm x 13 mm (Author: Firmo Espinar) -
Opal
Salina Island, Eolie Islands, Lípari Municipality, Messina Province, Sicily, Italy
1,7 x 1,5 cm (Author: Volkmar Stingl) -
Opal
La Carbonera Mine, La Trinidad, Municipio Tequisquiapan, Queretaro, Mexico
FoV 2,5 x 2 cm (Author: Volkmar Stingl) -
Opal
Case Montanini Quarry, Sant'Andrea Bagni, Medesano, Parma Province, Emilia-Romagna, Italy
6,5 x 4 cm (Author: Volkmar Stingl) -
Opal
Case Montanini Quarry, Sant'Andrea Bagni, Medesano, Parma Province, Emilia-Romagna, Italy
6,5 x 4 cm (Author: Volkmar Stingl) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
5.5 x 5.4 x 2.7 cm (Author: Michael Shaw) -
Opal
Tsehay Mewcha, Wegeltena, Delanta District, Semien Wollo Zone (North Wollo Zone), Amhara Region, Ethiopia
3.1 x 1.5 cm (Author: Michael Shaw) -
Opal
Quilpie, Quilpie Shire, Queensland, Australia
Specimen 9 x 5 cm (Author: Tobi) -
Opal
Coober Pedy, Central North, South Australia, Australia
Specimen size 3 cm (Author: Tobi) -
Opal
Coober Pedy, Central North, South Australia, Australia
Specimen size 3 cm (Author: Tobi) -
Opal
Coober Pedy, Central North, South Australia, Australia
Specimen size 3 cm (Author: Tobi) -
Opal
Coober Pedy, Central North, South Australia, Australia
Specimen size 3 cm (Author: Tobi) -
Opal
Coober Pedy, Central North, South Australia, Australia
Specimen size 3 cm (Author: Tobi) -
Opal
Lightning Ridge, Finch County, New South Wales, Australia
13.3 x 7.5 cm (Author: am mizunaka) -
Opal
Lightning Ridge, Finch County, New South Wales, Australia
(Author: am mizunaka) -
Opale is a kind of rarity from the Freiberg district, Erzgebirge, Saxony. The picture shows an 18th century find from the Sonnenwirbel Fundgrube (a rather small mine that was later consolidated with the famous Himmelsfürst mine). 6,5 cm so-called wood opale with label dating by 1780-1810. (Author: Andreas Gerstenberg)
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Opale
Caux, Pézenas Canton, Béziers District, Hérault, Occitanie, France
fov 4.5 mm (Author: ploum) -
Opened, showing the little massive pyrargyrite sample (3 cm) from Gesegnete Bergmannshoffnung mine, Obergruna, Freiberg district, Erzgebirge, Saxony. (Author: Andreas Gerstenberg)
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opening the calcite pocket more (Author: thecrystalfinder)
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opening the calcite pocket with first crystal to come out (Author: thecrystalfinder)
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orange 4 3 11 007.JPG (Author: Glenn Rhein)
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