Dioptase

specimen number:
2072069

location:
Tantara Mine, Shinkolobwe, Kambove, Haut-Katanga, DR Congo

description:
Large blocky emerald green pseudo-lustrous crystals of dioptase measuring to almost 1.5 cm in size covering the top of matrix. In good condition.

The Tantara Mine is located in the Haut-Katanga Province of the Democratic Republic of the Congo, situated within the prolific Central African Copperbelt. Geologically, the site is a copper-cobalt deposit hosted in the Neoproterozoic sedimentary rocks of the Katanga Supergroup, specifically within the Mine Series dolomites and shales. The mine is famous for its unique karst-like pocket systems where hydrothermal fluids rich in silica and copper interacted with the carbonate host rock. Tantara is world-renowned for producing what many consider the finest dioptase specimens ever discovered. These crystals are celebrated for their intense emerald-green color, high transparency, and exceptional luster. Unlike many other localities, the dioptase from Tantara often occurs as sharp, rhombohedral crystals on a contrasting white quartz or pinkish-white dolomite matrix, sometimes associated with blue plancheite or shattuckite. While the mine has seen periods of both industrial and artisanal activity over the last century, it remains a legendary locality for collectors due to the aesthetic perfection and size of its deep green silicate crystals.

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