This is an arborescent specimen of native copper with octahedral, dodecahedral
and hexaoctahedral forms. The surface of the copper has a thin coat of
microscopic crystals of
cuprite
and small scattered
calcite
crystals.
Copper on
calcite
Origin: Onganja Mine, Seeis, nr. Windhoek, Namibia, Africa
Sample size: 9.5 x 5.7 x 2.8 cm (top/2nd row), 5.6 x 1.8 x 1.2 cm (3rd/4th
row), 3.9 x 2.4 x 1.3 cm (5th/6th row), 3 x 2 x 1.1 cm (7th/8th row), 6.5 x
4.8 x 3.5 cm (9th/bottom row)
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