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Mineral Specimens with Quartz
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4.2 x 3.8 x 1.3 cm. A beautiful and unusual rhodochrosite specimen from the Uchucchacua Mine of Peru. Gemmy and lustrous, rose-red rhodochrosite rhombs have unusual, very distinctive, stepped-growth faces. The quartz association is very uncommon, as most rhodochrosites are on sulfide matrix from this noted locale. Striking material.
9.7 x 6.0 x 5.4 cm. Sharp, discrete calcite rhombs coated with drusy quartz richly and attractively cover the mounded matrix on this fine and rare specimen from Alpine County, California. The calcite rhombs reach 1.8 cm. Very seldom are any mineral specimens of any species available from Alpine County. Ex. Dennis Mullane Collection and dating from the 1970s or earlier.
9.5 x 5.4 x 4.7 cm. A striking doubly terminated smoky quartz crystal cluster from recent finds in the Goboboseb Mountains. This dramatic piece is very glassy, totally water-clear and interestingly, half of the crystal is colorless. Several faces of the smoky quartz have skeletal features, smoky color shading variations and clay inclusions. There is even a phantom within the smoky half. Complete-all-around. A highly representative and very fine smoky quartz from Brandberg.
10.5 x 9.5 x 4.7 cm. A 2.2 cm, splendent, interpenetrating, drill-bit-twinned cinnabar crystal rests atop a mounded cabinet quartz crystal matrix richly sprinkled with cream-colored dolomite rhombs on this outstanding specimen from Tongren, China, the premier locality for fine cinnabar crystals. This complete-all-around crystal has a beautiful, "ruby-silver" look to it, just like proustite or pyrargyrite crystals. Nearly pristine. This piece is a stellar example of the combination species and locale.
6.5 x 4.5 x 3.3 cm. A single gemmy, very sharp crystal to 2.7 cm on edge surmounts a crystallized quartz matrix, here. This is an exquisite specimen and it features unusual isolation of the crystal - most from this find are in aggregate clusters. The irregularity that you seem to see atop is, in fact, simply secondary crystallization adding a few small, gemmy, bright crystals as an accenting fan behind the larger one.
4.8 x 3.7 x 3.3 cm. This is so reminiscent of England it's uncanny. This miniatures size specimen hosts dozens of superb, sharp, lustrous, pyramidal crystals of Quartz that are included with Hematite / iron oxide to produce some of the most intense red Quartz crystals I've seen from Bolivia. I'm sorry I don't have a more specific locality for this material, but unfortunately that can be the nature of the beast with Bolivian minerals. I know the piece is indeed Bolivian in origin. It was purchased by Brian Kosnar directly from the miner who collected them while Brian was on a buying trip in Bolivia.
6.9 x 4.1 x 3.1 cm. A wonderful, sharp, very well formed, euhedral, dark Smoky Quartz crystal with semi-lustrous faces. There is a spot on the back of the crystal where it was clearly attached to the pocket wall, and has left a resulting scar, but it cannot be seen from the display side. Some minor beige/pink Microcline crystals at the base of the crystal make for a nice accent. A good representative specimen from this classic pegmatite district in Colorado. Ex. Brian Kosnar Collection.
14.2 x 5.0 x 0.6 cm. The Amethyst Vein in Creede was an amazing area that measured three miles long and produced some incredibly memorable pieces from this famous Silver mining district. This polished slab is a good example of the well known "sowbelly" variety of Amethyst/Quartz that was synonymous with this mine. It is actually nothing more than a polished section of the actual vein in the mine. The specimen was mined in the 1960s, and shows beautifully banded layers of white Quartz and purple Amethyst along with some dark greenish Sphalerite. One of the most impressive features of this specimen is the fact that it is rather gemmy when backlit. The slab has a blocky shape, as it was obviously cut against other pieces from the same chunk of ore. A fine piece of this now hard to find and classic material. Ex. Brian Kosnar Collection.
6.8 x 5.4 x 4.7 cm. A beautiful near "floater" specimen of the so-called "mud Quartz" from a fairly recent find in an Alpine-type deposit in Pakistan. In Europe, these skeletal Quartz specimens are sometimes called "Fenster" (German word for window), due to the fact that the pyramidal and prism faces have a skeletal form that gives them the appearance of a window. The brownish colored "mud" inclusions are some kind of pocket clay that was frozen inside of the Quartz as it was crystallizing. Where there are no inclusions, the Quartz crystals are water-clear, and have sharp, glassy surfaces all the way around. A very interesting doubly-terminated, multi-crystal specimen of this unusual material. Ex. Brian Kosnar Collection.
4.8 x 4.1 x 3.1 cm. A beautiful pocket of drusy, sparkling, sugary quartz coating rolling hills of chrysocolla, inside a massive piece of electric-blue chrysocolla matrix. This is carving quality material, and much is cabbed or crushed for lapidary use. As a specimen, this material is really just unique, and the combination from other localities seldom produces anything comparable in impact. From the well-known Tucson collection of 40-year collector, Harold Urish.
3.7 x 3.5 x 1.2 cm. A rarity. From the Erongo, there are almost no beautiful radioactives, and no other mineral with metallic green color - this is a metazeunerite, a 3.5 mm crystal perched on quartz. It is perfect. From the noted Erongo specialty collection of Heini Soltau.
9.7 x 8.8 x 2.5 cm. Here we have a very unusual specimen of what was formerly referred to as Hydroxylapatite from the famous find at the Sapo mine in 2004. These crystals have a truly unique appearance both from the standpoint of habit and color. The crystals are flattened dipyramids with no prism whatsoever, and have a light yellow center with beautiful bluish-green edges. Most of the specimens from this find featured isolated crystals of Apatite-(CaOH) on tan colored Feldspar crystals, but this piece is an unusually flattened Quartz crystal (crystallized all the way around) hosting several Apatite-(CaOH) crystals up to 1.7 cm. Unfortunately, it appears that Sapo may never produce these incredible specimens of this very rare species of Apatite again.
7.5 x 2.2 x 1.4 cm. From the find of the Fall of 2004. These Brookite specimens are some of the finest quality "Alpine-type" Brookites in the world. Reminiscent of the finest true Alpine Brookite specimens from the Italian and Swiss Alps, these crystals are just as sharp, lustrous, gemmy and colorful. This particular specimen features a few good quality razor-sharp, lustrous, gemmy, fiery red-orange Brookite crystals with classic black "phantoms" running the length of the crystals. To top if off, the Brookites are sitting atop doubly-terminated, multi-crystallized, colorless, sharp lustrous Quartz crystals with slight inclusions of "Byssolite". Ex. Richard Kosnar Collection.
7.4 x 5.0 x 4.2 cm. This is a good matrix specimen of Hubnerite from one of the most famous classic Bolivian localities. There are a few sharp, bladed, black (a very slight red color will appear with strong lighting) crystals of Hubnerite which are associated with dozens of sharp, lustrous, translucent, "butterfly"-twinned crystals of pinkish-orange Monazite-(Ce) with gemmy Quartz crystals on matrix. The Monazite crystals actually show a color change from a pinkish-orange hue in sunlight to a whitish-yellow color in incandescent light. These specimens are not common from Siglo Veinte and this piece is one of the better specimens of the material that I have handled. The largest Hubnerite crystal measures 2.2 cm, and the largest Monazite twin measures 3 mm.
3.5 x 3.3 x 1.5 cm. This specimen is a great toenail size piece consisting of good quality, sharp, translucent, prismatic, lavender "reverse" scepter prisms of Amethyst measuring up to 2.4 cm on matrix. This piece is remarkable for Bolivia as it features a type of crystallization that is virtually unheard of for this country. This is one of the better pieces from the find for quality, aesthetics and overall appeal.
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Rob Lavinsky, rob@irocks.com
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Mineral Specimens by species; or
by specimen id.
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share specimen![Rhodochrosite, Quartz from Uchucchacua Mine, Oyon Province, Lima Department, Peru [db_pics/mdpics/MD-283523a.jpg]](db_pics/mdpics/MD-283523a.jpg)
![Rhodochrosite, Quartz from Uchucchacua Mine, Oyon Province, Lima Department, Peru [db_pics/mdpics/MD-283523b.jpg]](db_pics/mdpics/MD-283523b.jpg)
![Calcite, Quartz from Alpine Co., California, USA [db_pics/mdpics/MD-283992a.jpg]](db_pics/mdpics/MD-283992a.jpg)
![Quartz (Var: Smoky Quartz) from Goboboseb Mountains, Brandberg area, Brandberg District, Erongo Region, Namibia [db_pics/mdpics/MD-283995a.jpg]](db_pics/mdpics/MD-283995a.jpg)
![Cinnabar, Quartz, Dolomite from Tongren Mine, Wanshan District, Tongren Prefecture, Guizhou Province, China [db_pics/mdpics/MD-283996a.jpg]](db_pics/mdpics/MD-283996a.jpg)
![Cinnabar, Quartz, Dolomite from Tongren Mine, Wanshan District, Tongren Prefecture, Guizhou Province, China [db_pics/mdpics/MD-283996b.jpg]](db_pics/mdpics/MD-283996b.jpg)
![Fluorite, Quartz from Riemvasmaak, Kakamas District, Northern Cape Province, South Africa [db_pics/mdpics/MD-284000a.jpg]](db_pics/mdpics/MD-284000a.jpg)
![Quartz from Potosà Department, Bolivia [db_pics/mdpics/MD-284008a.jpg]](db_pics/mdpics/MD-284008a.jpg)
![Quartz from Potosà Department, Bolivia [db_pics/mdpics/MD-284008b.jpg]](db_pics/mdpics/MD-284008b.jpg)
![Quartz (Var: Smoky Quartz) from Lake George, Park Co., Colorado, USA [db_pics/mdpics/MD-284024a.jpg]](db_pics/mdpics/MD-284024a.jpg)
![Quartz (Var: Amethyst), Sphalerite from Last Chance Mine (Del Monte Mine; New York Nine), Amethyst Vein, Creede District, Mineral Co., Colorado, USA [db_pics/mdpics/MD-284029a.jpg]](db_pics/mdpics/MD-284029a.jpg)
![Quartz from Wana, South Waziristan, Federally Administered Tribal Areas (FATA), Pakistan [db_pics/mdpics/MD-284038a.jpg]](db_pics/mdpics/MD-284038a.jpg)
![Chrysocolla, Quartz from Ray Mine, Scott Mountain area, Mineral Creek District (Ray District), Dripping Spring Mts, Pinal Co., Arizona, USA [db_pics/mdpics/MD-284718a.jpg]](db_pics/mdpics/MD-284718a.jpg)
![Metazeunerite, Quartz from Davib East farm (Davib Ost farm), Karibib District, Erongo Region, Namibia [db_pics/mdpics/MD-284749a.jpg]](db_pics/mdpics/MD-284749a.jpg)
![Metazeunerite, Quartz from Davib East farm (Davib Ost farm), Karibib District, Erongo Region, Namibia [db_pics/mdpics/MD-284749b.jpg]](db_pics/mdpics/MD-284749b.jpg)
![Apatite-(CaOH), Quartz from Sapo mine, Conselheiro Pena, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-284773a.jpg]](db_pics/mdpics/MD-284773a.jpg)
![Apatite-(CaOH), Quartz from Sapo mine, Conselheiro Pena, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-284773b.jpg]](db_pics/mdpics/MD-284773b.jpg)
![Brookite, Quartz from Kharan, Balochistan (Baluchistan), Pakistan [db_pics/mdpics/MD-284786a.jpg]](db_pics/mdpics/MD-284786a.jpg)
![Brookite, Quartz from Kharan, Balochistan (Baluchistan), Pakistan [db_pics/mdpics/MD-284786b.jpg]](db_pics/mdpics/MD-284786b.jpg)
![Hübnerite, Monazite-(Ce), Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284801a.jpg]](db_pics/mdpics/MD-284801a.jpg)
![Hübnerite, Monazite-(Ce), Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284801b.jpg]](db_pics/mdpics/MD-284801b.jpg)
![Hübnerite, Monazite-(Ce), Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284801c.jpg]](db_pics/mdpics/MD-284801c.jpg)
![Hübnerite, Monazite-(Ce), Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284801d.jpg]](db_pics/mdpics/MD-284801d.jpg)
![Hübnerite, Monazite-(Ce), Quartz from Siglo Veinte Mine (Siglo XX Mine; Llallagua Mine; Catavi), Llallagua, Rafael Bustillo Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284801e.jpg]](db_pics/mdpics/MD-284801e.jpg)
![Quartz (Var: Amethyst) from Bombori, Chayanta Province, Potosà Department, Bolivia [db_pics/mdpics/MD-284819a.jpg]](db_pics/mdpics/MD-284819a.jpg)