Corundum (Var: Ruby)
Small Cabinet, 5.4 x 4.4 x 4.4 cm
Munoanama, Kilimanjaro Region, Tanzania

A sharp, complete crystal of ruby (corundum), well-exposed on its granitic matrix, from Tanzania. It has a convex barrel shape, and you can clearly see three of its six sharp faces. The crystal measures around 2.5 cm in each direction.