Calaverite カラベライト 2.04 ct Fancy Cut 8.40 x 8.30 x 3.90 mm Colorado, USA max9456
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