black grains to 1 mm with
gillespite
Black grains to 2 mm in
sanbornite matrix with minor
gillespite.
Black grains intermixed with
gillespite (red) and slightly, faint green
sanbornite.
Origin: Trumbell Peak, Mariposa Co., California, U.S.A. (type locality)
Sample size: 2 x 2 x 2 cm (top), 2 x 2 x 1.5 cm (2nd row), 2.5 x 1 x 1 cm
(bottom)
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