Thumbnail, 0.8 x 0.7 x 0.5 cm
Talnakh, Norilsk, Siberia, Russia

This is a good reference specimen of CRYSTALLIZED cubic Platinum, very rare for the species. When cubes are found, they are usually malformed. Not these! This is a sharp, well-formed cube of Platinum (to 5 mm on edge) that even has several penetration twins emerging from it.