This specimen is comprised of aragonite with two forms - acicular and
horn-like. There is some minor
malachite
at the base of the specimen.
Origin: Sioux Ajax Mine, Juab County, Utah, Southwest U.S.A.
Sample size: 7.8 x 5 x 3.5 cm (top/2nd row), 6.5 x 4.5 x 3 cm (3rd/4th row),
7.5 x 4.8 x 3.7 cm (bottom)
This specimen has sprays of light blue coloured aragonite. The color is due to
trace amounts of copper.
Aragonite with inclusions of
cuprite
var. chalcotrichite
Origin: Tsumeb Mine, Tsumeb, Namibia, Africa
Sample size: 9.8 x 5.6 x 3.8 cm (top/2nd row), 4.2 x 2.7 x 2.7 cm (3rd/bottom
row)
Origin: Giumentaro mine, Sicily, Italy
Ex. Alessanro Genazzani collction
Sample size: 4 x 3 x 2.5 cm
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