Copper – Branching Crystals in and on Calcite from the Onganja Mine


1 in stock


This copper specimen is from the Onganja (Emke) Mine in the Onganja mining area, Seeis, Windhoek Rural, Khomas Region, Namibia. This mine sits upon the Voitskopf vein in an area containing several known veins. It contains 21 known different minerals in addition to native copper. This specimen consists of a calcite matrix that is included by and supports crystal formations of native copper. The crystallization varies from crude near the matrix to a mix of crude to well-defined with complex growth and habits (see photos closeup). The copper has a reddish to black patina with minor black and green oxidation in some areas. It measures 3 1/2 x 2 1/2 x 2 inches or 88 x 64 x 50 mm

Additional information

Weight 16 oz
Dimensions 5 × 5 × 5 in