Lot 661
Rare and Unique Dioptase on Calcite. Tsumeb Mine, Tsumeb, Namibia.
The contrast of the different textures of brilliant green dioptase makes this one of the most unusual dioptase specimens available on the market in some time. Dioptase such as this represents the world's best of species and is hard to obtain. This specimen is large and visually appealing and rare on the market. The Tsumeb Mine, in fact, is world renowned and has produced some of the most amazing dioptase mineral specimens for collectors.
On a slightly technical note, this particular specimen shows more than one generation of crystal growth. The large dioptase crystals (to approx. 1 cm) grew upon the most desirable matrix - contrasting, white calcite crystals. Extraordinarily, after the major dioptase crystals were formed, a SECOND generation of micro-sized dioptase crystallization occurred. This resulted in a very thin layer of tiny, sugary sparkle atop the already glassy and lustrous dioptase on the left side of the specimen.
This piece is undamaged, and of sufficient size to visually impress. Interestingly, lesser specimens have sold in other mineral auctions for similar prices as suggested here, without offering this uniqueness of quality and individuality as well as the sparkling color. This specimen was displayed until recently on special loan to the exhibition Mineral Treasures at the Beijing Museum of Natural History, in China.
Measures 9.8 x 7.6 x 4.8 cm.
A custom lucite base for display is included.
Estimated Value $45,000 - 50,000.
Beijing Musuem of Natural History 2010 exhibition.
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