Calaverite カラベライト 1.78 ct Fancy Cut 9.70 x 9.10 x 5.10 mm Colorado, USA max9455
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