This lustrous, silver pyritohedron-shaped crystal (quite rare compared to the more common cubic habit) of Cobaltite rests on massive ore, and this single crystal is nearly 1 cm across. The Cobaltite has very good luster, and is sharp! The faces are striated and partially etched, but not to the detriment of the aesthetics. Mining from this copper-zinc-lead-cobalt mine occurred for about two hundred years, and ended in 1873. It displays very nicely! This is an old European classics in excellent form, even by modern standards.