Calaverite カラベライト 1.07 ct Trillion Cut 7.20 x 7.20 x 4.70 mm Colorado, USA max9452
Calaverite a Rare Gold Telluride mixed into chalcedony/granite matrix.
The formula is (AuTe2). Small quantity of silver may also be found.
It comes from Cripple Creek Mining District, Teller County, Colorado, USA