This specimen is about the best you can ask for in the species, with lustrous, wet-looking, jet black crystals in 1.2 cm radial aggregates richly covering the matrix. It IS a most impressive specimen, in person, for a black mineral - without even knowing anything about the species. But, given what it is, I find it one of the most interesting pieces in the update for rarity. 5.7 x 3.5 x 2.2 cm