Chalcotrichite on
calcite
Origin: Onganja Mine, Seeis, nr. Windhoek, Namibia, Africa
Sample size: 4.6 x 3.3 x 2.5 cm
This specimen has abundant lustrous crystals of cuprite with cubes and
dodecahedral forms. Also found are scattered crystals of
wulfenite
and fairly abundant yellow crystal clusters of
willemite.
The largest
wulfenite
crystals are 0.6 cm across.
Cuprite on
calcite
This specimen has abundant lustrous crystals of cuprite with dodecahedral and
octahedral modifying forms.
Wulfenite
is also found on the specimen as partial crystals.
Origin: Tsumeb Mine, Tsumeb, Namibia, Africa
Sample size: 6.5 x 5.7 x 4.5 cm (top/2nd row), 7.1 x 5.5 x 3.7 cm (3rd/4th
row), 9 x 7 x 6.5 cm (5th/bottom row)
Variety chalcotrichite
Origin: Allouez Mine, Houghton County, Michigan, U.S.A.
Ex. Keith Hayes collection
Sample size: 6.2 x 3.9 x 3.0 cm
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