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Mineral Specimens with Dioptase
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3.3 x 2.0 x 1.8 cm. An old-time, showy and excellent combination toenail of deep, emerald-green dioptase crystals nicely accented by pastel blue-green plancheite botryoids from Reneville, Republic of the Congo. This piece was undoubtedly collected in the 1950s and this locality is now extinct. I like the pointed ends, covered with gemmy dioptase crystals. Ex. Jack Halpern Collection #2516.
2.9 x 2.9 x 1.4 cm. Jewel-like little gemmy crystals of dioptase, with some mossy mottramite intermixed, from the prime worldwide dioptase locality - and probably the worlds greatest mineral locality overall. The balance of dioptase crystals with the mottramite here gives this an especially pretty appearance.
2.2 x 1.3 x 1.0 cm. Gemmy and lustrous, dark emerald-green dioptase crystals form an aesthetic, arborescent thumbnail specimen from the Tsumeb Mine. Old dealer stock of Collector’s Choice, Dalton and Consie Prince, of Houston.
5.4 x 4.4 x 2.9 cm. A pretty specimen of lustrous dioptase crystals on a matrix of euhedral calcites, with a later generation of micro-calcites that formed on part of the specimen, giving it the mossy accenting color. So you have a mix of the stark white calcite, glassy green dioptase and the more velvety areas with the micro-calcites. Tsumeb dioptases are ALWAYS highly desirable!
2.7 x 2.7 x 2.7 cm. A RARE and VERY SHOWY combination specimen from Tsumeb of gemmy and lustrous, emerald-green dioptase crystals tucked into a two-sided vug between calcite crystals coated with lustrous, black heterogenite. Heterogenite is a rare cobalt hydroxide and the coated step-faced and blocky calcite crystals are a very nice feature to this excellent Tsumeb rarity. Ex. Rob Smith Collection.
2.0 x 1.7 x 1.4 cm. Dioptase is known from a few world localities in superb quality specimens, but recently there was a find of new material in the Pool Region of the Congo. These specimens show great color, with larger sized crystals and EXCELLENT gemminess. This particular specimen is comprised of very sharp, highly lustrous, gemmy, rich emerald green color Dioptase crystals forming a very attractive thumbnail specimen. This find seemed to be somewhat limited, and hopefully will produce more of this SUPERB quality Dioptase. With the price of Tsumeb Dioptase specimens rising daily, this is a great opportunity to snag a "Tsumeb"-type quality specimen of this species for a fraction of the price. A gorgeous thumbnail of this exciting new material. Ex. Brian Kosnar Collection.
4.9 x 2.6 x 2.1 cm. The star of this Tsumeb dioptase is a 1.8 cm crystal that has this very unusual and pretty multiply terminated, stepped form. These emerald green crystals are surrounded by black heterogenite, so the specimen has an unusual appearance compared to the average Tsumeb diop. Tsumeb dioptases are ALWAYS desirable and have always been among the crystal specimens most highly prized by collectors.
10.7 x 6.6 x 4.2 cm. Super sparkly, gemmy and lustrous, emerald-green dioptase crystals are festooned on both sides of a vuggy, sculptural gossan matrix on this aesthetic and excellent Tsumeb CABINET specimen. Ex. Rob Smith Collection.
3.2 x 2.0 x 1.9 cm. A HUGE, highly lustrous, dark emerald-green dioptase crystal from Reneville, Republic Of The Congo. This exceptional dioptase is pristine and is partially gemmy. Dioptase of this quality came out in the 1950s and 60s. The back is contacted, but is out of sight. Ex. George Elling Collection.
7.0 x 5.4 x 3.4 cm. An aesthetic specimen of a rich cluster of very gemmy and lustrous, dark emerald-green dioptase crystals jauntily perched atop a banded plancheite-covered matrix from the classic Congo locality of Reneville. The largest crystal is 1.2 cm and all of the major crystals are undamaged. A bit of scattered edge wear is certainly not a detraction on this old-timer. Ex. Brent Lockhart Collection.
4.3 x 2.3 x 2.1 cm. This matrix specimen with minor quartz association features a radial spray/cluster of intergrown, gemmy and glassy, emerald green dioptase crystals. The cluster measures 1.5 cm across. Dramatic! Ex. Charlie Key.
3.0 x 2.6 x 2.3 cm. Gemmy and glassy, emerald green crystals of dioptase, to .5 cm across are flanked by white, cauliflower-like growths of calcite. A lovely color combination! Ex. Charlie Key.
8.5 x 6.1 x 2.8 cm. A wonderful and uncommon specimen from the famous Tsumeb Mine! This is a cluster of super-sharp rhombs of calcite, given their beautiful green tone by a myriad of tiny, bright green crystals of dioptase inside! Tsumeb is justly famous for its dioptase, and also produced fine calcite specimens in all sorts of forms. Here you have something truly unusual, and in superb condition. The crystals measure to 1.8 cm along the edge. With a loupe, you can see how the tiny dioptases grew on the calcite surfaces at some point, and then were engulfed when growth of the calcites started up again. Ex. Rob Smith Tsumeb collection.
5.5 x 5.1 x 4.1 cm. A RARE association of cerrusite with fine green dioptase crystals, from the world’s greatest mineral locality! This is a narrow seam of gemmy dioptases with top color and luster, nestled under a euhedral crystal of slightly smoky cerussite!
4.6 x 3.1 x 2.6 cm. Dioptase is known from a few world localities in superb quality specimens, but recently there was a find of new material in the Pool Region of the Congo. These specimens show great color, with larger sized crystals and EXCELLENT gemminess. This particular specimen is comprised of very sharp, highly lustrous, GEMMY, rich emerald green color Dioptase crystals on minor matrix forming a very attractive overall specimen. This find seemed to be somewhat limited, and hopefully will produce more of this SUPERB quality Dioptase. Ex. Brian Kosnar.
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Rob Lavinsky, rob@irocks.com
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share specimen![Dioptase, Plancheite from Brazzaville (Renéville; Djoué), Brazzaville Department (Renéville Department), Republic of Congo (Brazzaville) [db_pics/mdpics/MD-140466a.jpg]](db_pics/mdpics/MD-140466a.jpg)
![Dioptase, Mottramite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-142335a.jpg]](db_pics/mdpics/MD-142335a.jpg)
![Dioptase, Mottramite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-142335b.jpg]](db_pics/mdpics/MD-142335b.jpg)
![Dioptase from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-142381a.jpg]](db_pics/mdpics/MD-142381a.jpg)
![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146048a.jpg]](db_pics/mdpics/MD-146048a.jpg)
![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146048b.jpg]](db_pics/mdpics/MD-146048b.jpg)
![Dioptase, Heterogenite, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146140a.jpg]](db_pics/mdpics/MD-146140a.jpg)
![Dioptase from Kimbedi, Pool Region, Republic of Congo (Brazzaville) [db_pics/mdpics/MD-146729a.jpg]](db_pics/mdpics/MD-146729a.jpg)
![Dioptase, Heterogenite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146936a.jpg]](db_pics/mdpics/MD-146936a.jpg)
![Dioptase, Heterogenite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146936b.jpg]](db_pics/mdpics/MD-146936b.jpg)
![Dioptase from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146947a.jpg]](db_pics/mdpics/MD-146947a.jpg)
![Dioptase from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-146947b.jpg]](db_pics/mdpics/MD-146947b.jpg)
![Dioptase from Brazzaville (Renéville; Djoué), Brazzaville Department (Renéville Department), Republic of Congo (Brazzaville) [db_pics/mdpics/MD-146976a.jpg]](db_pics/mdpics/MD-146976a.jpg)
![Dioptase, Plancheite from Brazzaville (Renéville; Djoué), Brazzaville Department (Renéville Department), Republic of Congo (Brazzaville) [db_pics/mdpics/MD-152687a.jpg]](db_pics/mdpics/MD-152687a.jpg)
![Dioptase, Plancheite from Brazzaville (Renéville; Djoué), Brazzaville Department (Renéville Department), Republic of Congo (Brazzaville) [db_pics/mdpics/MD-152687b.jpg]](db_pics/mdpics/MD-152687b.jpg)
![Dioptase from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-155860a.jpg]](db_pics/mdpics/MD-155860a.jpg)
![Dioptase, Calcite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-155861a.jpg]](db_pics/mdpics/MD-155861a.jpg)
![Calcite, Dioptase from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-156126a.jpg]](db_pics/mdpics/MD-156126a.jpg)
![Dioptase, Malachite, Cerussite from Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia [db_pics/mdpics/MD-156139a.jpg]](db_pics/mdpics/MD-156139a.jpg)
![Dioptase from Kimbedi, Pool Region, Republic of Congo (Brazzaville) [db_pics/mdpics/MD-157597a.jpg]](db_pics/mdpics/MD-157597a.jpg)