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Mineral Specimens with Aragonite
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2.7 x 2.3 x 1.5 cm. Just a very interesting Mexican thumbnail specimen. You can make out the form of the original crystal of aragonite, which has been pseudomorphed by orangey agate. Unusual. Ex. Carlton Davis Collection.
13.4 x 10.8 x 7.3 cm. A superb example of the aragonites from this one-time find of a couple of years ago - not only beautiful, but an important new find of aragonite from anywhere, much less America. They have a unique look, with tiny crystals growing like teeth on an earlier generation of sharp, larger crystals. This is not only a large specimen, but the crystals really stick up off the matrix in bold relief, in a series of interconnected bursts of crystals framed by the contrasting iron-rich matrix.
5.6 x 4.8 x 4.4 cm. A superb combination specimen from the Tsumeb Mine and the Rob Smith Collection. An impressive cluster of sharp, lustrous, translucent, light tan aragonite variety tarnowitzite crystals dominates one edge of the specimen that is richly covered with contrasting green malachite. The tarnowitzite crystals reach 2.0 cm.
1.7 x 1.6 x 1.1 cm. Here is a fine thumbnail specimen of the famous pseudomorphs of Copper after Aragonite from Corocoro. These floater specimens are well known from Bolivia for their great form and color, and this piece has the classic and unique form that has made these pieces some of the most well known and highly sought after pseudomorphs around. This specimen is a very fine example of this material.
7.3 x 4.9 x 4.0 cm. This is an example of a rare phenomenon at Bisbee: mine timbers from the very old works that, over time, stalactitic, botryoidal aragonite formed on - which in turn got a pretty green color from copper staining. Once this was considered a cuprian aragonite variety called locally "brucksite." Ex. Mullane Collection.
10.8 x 7.0 x 6.5 cm. A superb specimen of aragonite from this one-time find. They have a unique look, with tiny crystals growing like teeth on an earlier generation of sharp, larger crystals. This is not only a large specimen, but the crystals are piled up in bold relief, in rich, gorgeous puffs.
14.8 x 8.9 x 5.4 cm. A fine cupric aragonite specimen from recent finds at Wenshan, China, source of many fine hemimorphite specimens as well. They have the look of sea coral (and in fact are not chemically very different at all), though were formed stalactitically rather than by little sea animals. The color is a wonderful sky-blue, from the copper content.
14.5 x 8.9 x 3.8 cm. Snowy white blooms of aragonite on matrix, from Santa Eulalia. Quite delicate, with pretty little starbursts of crystals.
13.4 x 11.0 x 5.4 cm. A large specimen of aragonite from Wenshan, where the pretty blue hemimorphites come from - but these cupric aragonites get their color from the copper content. They look a lot like coral, and chemically, are very similar - but created by stalactitc deposition rather than deposition by tiny sea creatures.
4.8 x 3.4 x 2.4 cm. Tarnowitzite is the familiar name for plumboan (lead-rich) aragonite (which of course is a polymorph of calcite). It is uncommon, good crystals being known from under 10 localities worldwide (including Tsumeb). This specimen from Morocco is unusually aesthetic for the species, with sharp, glistening crystals jutting up from schist matrix. Ex. Jaime Bird Collection.
9.4 x 6.9 x 6.5 cm. A fine specimen of this pretty material from Wenshan, the famous hemimorphite locality. It looks almost like coral, and in fact, is chemically almost identical, except formed by deposition rather than tiny sea animals. The sky-blue color is from copper content.
14.4 x 8.5 x 7.8 cm. A superb example of the aragonite from this one-time find bought out a couple of years ago - not only beautiful, but an important new find of aragonite from anywhere, much less America. They have a unique look, with tiny crystals growing like teeth on an earlier generation of sharp, larger crystals. This is not only a large cabinet specimen, but the crystals really stick up off the 3-dimensional matrix in bold relief, in a series of interconnected bursts of crystals framed by the contrasting iron-rich matrix.
13.4 x 8.1 x 7.2 cm. A truly classic specimen. Almost no sulphur specimens are being recovered these days from Sicily. Isolated, sharp, gemmy and lustrous, canary-yellow sulphur crystals to 1.0 cm are richly and aesthetically scattered on the contrasting, tan aragonite cabinet matrix. All of the many major sulfur crystals are pristine.
9.0 x 8.2 x 6.4 cm. A fine, two-sided specimen from recent Chinese finds. A beautiful growth of stalactitic aragonite, with stunning sky-blue to very light blue color from copper content. Note how the growth started out botryoidal, and then shifted to more branchlike forms as the stalactites grew. The piece has a coral-like "bloom" form.
12.0 x 8.0 x 6.5 cm. A fine cabinet example of the aragonite from this one-time find at the Northern Lights Mine. They have a unique look, with tiny crystals growing like teeth on an earlier generation of sharp, larger crystals. This is not only a large specimen, but the crystals really stick up off the matrix in bold relief, in a series of interconnected bursts of crystals framed by the contrasting iron-rich matrix.
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Rob Lavinsky, rob@irocks.com
All Content and Design ©1996-2012 The Arkenstone
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share specimen![Chalcedony (Var: Agate), Aragonite from Mun. de Casas Grandes, Chihuahua, Mexico [db_pics/mdpics/MD-206356a.jpg]](db_pics/mdpics/MD-206356a.jpg)
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![Aragonite from Santa Eulalia District, Mun. de Aquiles Serdán, Chihuahua, Mexico [db_pics/mdpics/MD-213225a.jpg]](db_pics/mdpics/MD-213225a.jpg)
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![Aragonite from Wenshan Mine, Dulong ore field, Wenshan Co., Wenshan Autonomous Prefecture, Yunnan Province, China [db_pics/mdpics/MD-228368b.jpg]](db_pics/mdpics/MD-228368b.jpg)
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