Calaverite カラベライト 2.11 ct Fancy Cut 11.10 x 8.90 x 5.50 mm Colorado, USA max9458
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