This is a solid 23-gram specimen of germanite-rich ore from level 37 of the Tsumeb Mine, deep in its third oxidation zone. This region was noted for its incredible wealth of very rare elements and minerals containing germanium, among others. From the well-known collection of Belgian teacher and Tsumeb collecting specialist, Willy Israel.
Attribution: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
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