- Chalcopyrite, Proustite
- Thumbnail, 2.2 x 2.1 x 1.7 cm
- Chispas Mine (Pedrazzini mine), Arizpe, Mun. de Arizpe, Sonora, Mexico
- Ex. Charlie Key
A superb and sharp hoppered Proustite crystal liberally coated on the outside with a very fine sparkly druse of metallic Chalcopyrite crystals. The Proustite is extremely gemmy, has a great luster, and its hoppered habit is fantastic. Ex. Charlie Key.