- Thumbnail, 2.2 x 1.7 x 1.4 cm
- Tiefer Gold Mine, Western Australia, Australia
- Ex. Irv Brown
This is an exquisite, highly sculptural, and extremely splendent, thumbnail of chalcocite, a copper sulfide. The dark gray crystals are sharply doubly terminated, to 1.5 cm across. They have awesome luster! This has to rank as one of the finest thumbnails of the species.