Specimen with veining and grains of steel gray uytenbogaardtite associated with
electrum (variety of
) as micro grains less than 0.5 mm
Slab with good coverage showing grey crystal grains to 1 mm throughout matrix
with electrum (variety of
Origin: Bullfrog mine, Nye Co., Nevada, U.S.A.
Sample size: 9 x 7 x 2.5 cm (top), 6 x 6 x 1 cm (bottom)
A sliced slab of matrix showing grayish masses of uytenbogaardtite with minor
Origin: Bullfrog Mine, Bullfrog Hills, Beatty, Nye Co., Nevada, U.S.A.
Sample size: 4.8 x 4 x 0.6 cm