In addition to what are probably the world's best wurtzite crystals, the world's best alabandine crystals also came to light from the tanzanite mines. They have been known for a long time, the miners call them "chuma", the Swahili word for iron. They thought these crystals were rotten pyrite crystals. This crystal is a highly distorted octahedron.
Mererani, Simanjiro, Tanzania
9 x 8.5 cm weight 507 gr
