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Mineral Specimens with Quartz
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7.0 x 3.7 x 2.5 cm. Bbeautifully gemmy, twinned and un-twinned, red sphalerite crystals are very aesthetically set on this quartz crystal-covered plate from China. The central, 2.4 cm crystal is superb, complete all-around and is very well placed. The entire piece is pristine, except for a small contact on the lower front of the large sphalerite crystal. Choice material and considered some of the finest sphalerites in the world. The unretouched backlit photo highlights the gemminess and gorgeous red color saturation of the sphalerites.
7.5 x 5.6 x 4.8 cm. This is a now very rare Arizona old-timer: a thick layer of translucent, botryiodal quartz on deep robins-egg blue chrysocolla, which in turn is on underlying malachite. The covering of silky quartz appears almost as if added to dress up the chrysocolla underneath, giving it the appearance of a translucent smithsonite. The color is glorious!
11.9 x 7.4 x 2.5 cm. A gorgeous "flower," more accurately the shape of a peacock fan, from Brazil. There is no matrix behind the crystals - only at the base where the crystals fan out - so in good light, the light comes right through them! Exceptionally good large piece here.
3.9 x 3.1 x 1.6 cm. From the collection of Steve Smale, a pretty, matrix-free cluster of the most desirable and hard-to-get rose varietal of quartz. Exceptional aesthetics.
6.2 x 4.4 x 3.9 cm. Uruguayan amethyst is remarkable for its intense purple color and gemminess; it is a far cry from (and valued much more highly than) Brazilian amethyst. These spiky "knobs" are particularly aesthetic and always prized when in fine shape, as this one is.
14.5 x 11.4 x 6.1 cm. From the new find at the Okarusu Mine - not only a BIG, RICH plate of fine fluorite, but uniquely, decorated with white quartzes! These big crystals measure up to 3.5 cm across the edge. We shot them under natural light, but put this specimen under strong light and it lights up the most unbelievable glowing green/blue color! There is no matrix - it is solid crystal, so the light can come right through. Note the natural corner modifications - that is NOT damage, this piece is in superb condition!
6.6 x 4.9 x 4.9 cm. These elegant Le Chang quartzes have such a "classic" look to them, with their subtle rusty-red hematite inclusions giving them a look similar to some English calcites. The quartz matrix at the bottom has a sprinkling of shiny black specular hematite as well. The crystals here measure to 3.5 cm in length; they lean in towards one another to make a very aesthetic specimen.
8.9 x 5.2 x 4.2 cm. On a matrix of sphalerite and sulfides is a beautiful profusion of very slender, gemmy and elegant quartz crystals, shooting out in all directions. They wrap 3-dimensionally around the specimen. An exquisite piece from Eastern Europe!
10.4 x 7.9 x 5.9 cm. This quartz specimen is absolutely bizarre for Brandberg. It looks much more like something you would see from Brazil, an incredibly complex compound crystal that looks as if it is composed of dozens of beta-style quartzes piled atop one another. There is some skeletal growth apparent in places. It shares similarities to Brazilian quartzes sometimes known as "elestial" quartz. At any rate, this compound growth has wrapped itself around a large core crystal of colorless quartz. The faces are exactly aligned so they flash at the same time. There is some hematite inclusion, giving the crystals their rusty tint. Again, very unusual for Brandberg, so a significant locality quartz specimen! From the collection of David Mansfield, son-in-law of the late great dealer and Tsumeb exporter, Sid Pieters of South Africa.
18.9 x 14.5 x 4.3 cm. What you see here on this old-timer from the Mex-Tex, out of an old collection, is a very large cube (3.5 cm across) of galena with a coating of the lead oxide plattnerite on it. A smaller, similar cube is over towards the edge of the specimen. This is not common; it is a lot more typical to see a druse of cerussite (another lead mineral) than it is plattnerite, from this area. You can see traces of a copper mineral, likely brochantite or perhaps malachite, on and near the smaller cube (perhaps an alteration in progress). The quartz matrix makes an attractive backdrop to this significant New Mexico Galena crystal!
8.6 x 4.2 x 2.4 cm. A striking, incredibly complex and interesting floater compound crystal of quartz from Pakistan. It is frankly quite difficult to describe what is going on here from a crystallographic perspective, because there is so MUCH going on. Some of the sub-crystals have conventional terminations, and others have unusual chisel-shaped ones more reminiscent of barite. The whole thing is very gemmy, and has glassy luster as well, so it is really pretty to look at in addition to being a truly unusual quartz specimen. If you are into crystallography, you could spend weeks with this specimen without getting bored.
11.4 x 7.1 x 6.9 cm. This old specimen of dramatically-isolated tennantite crystals came out of collection of the well-known A.E. Seaman Mineralogical museum. Measuring to one centimeter, the tennantites are on and embedded in a layer of stark white crystalline quartz that has pseudomorphed barite. The back of the specimen is a sort of mixed druse of micro-tennantite and quartz.
9.0 x 6.7 x 5.9 cm. A complex and unusual combo specimen from India. In the middle of the specimen is a fan of reddish-brown heulandite that anchors the top and bottom. Above, you have grey stalactitic drusy quartz, with peachy stilbites and a gemmy little fluorapophyllite. Ex. Rebecca Stewart collection.
1.9 x 1.2 x 1.2 cm, 1.9 x 1.2 x 0.8 cm, 1.8 x 0.8 x 0.7 cm, 1.4 x 0.7 x 0.7 cm, 1.4 x 1.2 x 1.2 cm, 1.2 x 0.7 x 0.7 cm, 0.9 x 0.6 x 0.5 cm. A set of 7 superb floater quartz crystals from Herkimer, New York - known as "Herkimer Diamonds" for their incredible gem-like quality, unique in the world. They contain natural inclusions of dark bituminous. These are found by laboriously opening pockets in large, very hard boulders.
7.0 x 3.4 x 2.5 cm. Xenotime is an uncommon rare earth, being yttrium phosphate. This excellent and showy specimen features a 1.3 cm cluster of three, sharp, parallel-growth, brown xenotime crystals and a 8 mm, isolated crystal aesthetically set on an attractive pair of very glassy, transparent, smoky quartz crystals. Matrix xenotime specimens are NOT that common, so even the contacted side and broken termination on the quartz are not that detracting. The smaller, sidecar smoky is essentially pristine.
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Rob Lavinsky, rob@irocks.com
All Content and Design ©1996-2012 The Arkenstone
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share specimen![Sphalerite, Quartz from Rucheng Mine, Chaojia, Nuanshui, Rucheng Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-135288a.jpg]](db_pics/mdpics/MD-135288a.jpg)
![Sphalerite, Quartz from Rucheng Mine, Chaojia, Nuanshui, Rucheng Co., Chenzhou Prefecture, Hunan Province, China [db_pics/mdpics/MD-135288b.jpg]](db_pics/mdpics/MD-135288b.jpg)
![Quartz, Chrysocolla, Malachite from Piedmont Mine (Congress West Mine; West Congress Mine; Copper Creek Mine; Copper Queen claims; Bloody Basin Mineral Development Co. property), Bradshaw Mts (Bradshaw Range), Yavapa [db_pics/mdpics/MD-136003a.jpg]](db_pics/mdpics/MD-136003a.jpg)
![Quartz (Var: Amethyst) from IraÃ, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil [db_pics/mdpics/MD-136005a.jpg]](db_pics/mdpics/MD-136005a.jpg)
![Quartz (Var: Amethyst) from IraÃ, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil [db_pics/mdpics/MD-136005b.jpg]](db_pics/mdpics/MD-136005b.jpg)
![Quartz (Var: Rose Quartz) from Alto da Pitorra, Laranjeiras, Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-136007a.jpg]](db_pics/mdpics/MD-136007a.jpg)
![Quartz (Var: Rose Quartz) from Alto da Pitorra, Laranjeiras, Galiléia, Doce valley, Minas Gerais, Southeast Region, Brazil [db_pics/mdpics/MD-136007b.jpg]](db_pics/mdpics/MD-136007b.jpg)
![Quartz (Var: Amethyst) from Artigas, Artigas Department, Uruguay [db_pics/mdpics/MD-136010a.jpg]](db_pics/mdpics/MD-136010a.jpg)
![Quartz (Var: Amethyst) from Artigas, Artigas Department, Uruguay [db_pics/mdpics/MD-136010b.jpg]](db_pics/mdpics/MD-136010b.jpg)
![Fluorite, Quartz from Okorusu Mine (Okarusu Mine), Otjiwarongo District, Otjozondjupa Region, Namibia [db_pics/mdpics/MD-136012a.jpg]](db_pics/mdpics/MD-136012a.jpg)
![Fluorite, Quartz from Okorusu Mine (Okarusu Mine), Otjiwarongo District, Otjozondjupa Region, Namibia [db_pics/mdpics/MD-136012b.jpg]](db_pics/mdpics/MD-136012b.jpg)
![Quartz, Hematite from Lechang Co., Shaoguan Prefecture, Guangdong Province, China [db_pics/mdpics/MD-136021a.jpg]](db_pics/mdpics/MD-136021a.jpg)
![Quartz, Hematite from Lechang Co., Shaoguan Prefecture, Guangdong Province, China [db_pics/mdpics/MD-136021b.jpg]](db_pics/mdpics/MD-136021b.jpg)
![Quartz, Galena from Boldut Mine, Cavnic (Kapnic; Kapnik), Maramures Co., Romania [db_pics/mdpics/MD-136024a.jpg]](db_pics/mdpics/MD-136024a.jpg)
![Quartz, Galena from Boldut Mine, Cavnic (Kapnic; Kapnik), Maramures Co., Romania [db_pics/mdpics/MD-136024b.jpg]](db_pics/mdpics/MD-136024b.jpg)
![Quartz (Var: Smoky Quartz) from Brandberg area, Brandberg District, Erongo Region, Namibia [db_pics/mdpics/MD-136028a.jpg]](db_pics/mdpics/MD-136028a.jpg)
![Galena, Quartz from Mex-Tex Mine, Bingham, Hansonburg District, Socorro Co., New Mexico, USA [db_pics/mdpics/MD-136082a.jpg]](db_pics/mdpics/MD-136082a.jpg)
![Quartz from Miram Shah Tribal Area (Miran Shah; Mirumshah; Miranshah), North Waziristan, Federally Administered Tribal Areas (FATA), Pakistan [db_pics/mdpics/MD-136087a.jpg]](db_pics/mdpics/MD-136087a.jpg)
![Quartz from Miram Shah Tribal Area (Miran Shah; Mirumshah; Miranshah), North Waziristan, Federally Administered Tribal Areas (FATA), Pakistan [db_pics/mdpics/MD-136087b.jpg]](db_pics/mdpics/MD-136087b.jpg)
![Tennantite, Quartz, Baryte from Cobre Mine, Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico [db_pics/mdpics/MD-136100a.jpg]](db_pics/mdpics/MD-136100a.jpg)
![Tennantite, Quartz, Baryte from Cobre Mine, Concepción del Oro, Mun. de Concepción del Oro, Zacatecas, Mexico [db_pics/mdpics/MD-136100b.jpg]](db_pics/mdpics/MD-136100b.jpg)
![Epistilbite, Heulandite, Stilbite, Apophyllite-(KF), Quartz from Jalgaon District, Maharashtra, India [db_pics/mdpics/MD-136116a.jpg]](db_pics/mdpics/MD-136116a.jpg)
![Quartz (Var: Herkimer Diamond) from Herkimer Co., New York, USA [db_pics/mdpics/MD-136208a.jpg]](db_pics/mdpics/MD-136208a.jpg)
![Xenotime-(Y), Quartz (Var: Smoky Quartz) from Novo Horizonte, Bahia, Northeast Region, Brazil [db_pics/mdpics/MD-136225a.jpg]](db_pics/mdpics/MD-136225a.jpg)
![Xenotime-(Y), Quartz (Var: Smoky Quartz) from Novo Horizonte, Bahia, Northeast Region, Brazil [db_pics/mdpics/MD-136225b.jpg]](db_pics/mdpics/MD-136225b.jpg)