Dioptase
Unknown Owner
A cluster of lustrous emerald green dioptase crystals without matrix. In great condition, a superb thumbnail.The Tsumeb Mine, located in the Otavi Mountainland of northern Namibia, is a world-renowned polymetallic deposit and a premier locality for secondary minerals. Geologically, it is a pipe-like ore body hosted within Neo-Proterozoic carbonate rocks, particularly dolomite, where deep-reaching oxidation created an incredibly diverse mineralogical environment. The mine is famous for its exceptional dioptase, which occurs as intense, emerald-green rhombohedral crystals of incredible clarity and luster, often found in striking contrast against a matrix of white calcite or dolomite. Historically, the deposit was known by local San and Owambo people for centuries before German colonial interest led to the formation of the Otavi Minen-und Eisenbahn-Gesellschaft (OMEG). Industrial operations began in 1907 and continued with few interruptions until the mine finally closed in 1996 due to flooding and economic factors. Over its 89-year life, Tsumeb produced millions of tons of copper, lead, and zinc ore, while simultaneously providing the global mineral market with some of the most aesthetic and scientifically significant specimens ever recovered.
Product details
Species
SizeThumbnail
Dimensions2.4 x 1.1 x 0.7 cm
Added on05/19/2026
Locality
Known provenance
| Date | Collector | Acquisition price |
|---|---|---|
| 05/2026 | Unknown Owner | $300.00 |
| — | Weinrich Minerals | Not disclosed |
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Mineral guide
Learn about Dioptase
vivid emerald-green crystals with glassy luster, often on white calcite or quartz; highly collectible due to color, clarity, and brittleness.
Regional guide
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