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Dioptase – diopt161 - $ 16 + postage $ 6Tsumeb Mine, Tsumeb, Otjikoto (Oshikoto)Region, Namibia. Dioptase crystals on a dolomite matrix. The largest dioptase crystalis about 3 mm long. Weight 13 grams. Specimen size 27x29 mm and 11 mm thick.
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