This specimen of
cuprite
and
chalcocite is covered with rich green crystals of primary malachite. The
malachite is found as acicular crystals crudely aligned into rhombs. There are
also a few small
calcite
crystals colored red by inclusions of
cuprite
var. chalcotrichite.
A crystal group of large deep ruby red
cuprite
crystals with a thin bright green coating of malachite as an alteration
species. There are also two small clusters of
calcite
attached to the specimen.
A crystal of deep ruby red
cuprite
with a thin bright green coating of malachite as an alteration species.
Origin: Onganja Mine, Seeis, nr. Windhoek, Namibia, Africa
Sample size: 6.9 x 5.1 x 3.8 cm (top/2nd row), 6.6 x 3.3 x 3 cm (3rd/4th row),
4.6 x 3.7 x 3.2 cm (5th/6th row), 4.5 x 3.3 x 3 cm (7th/bottom row)
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