Tanzanite - variety of purple blue Zoisite.
 
 
From: Merelani Hills, Simanjiro, Manyara, Tanzania.
 
 
Translucent prismatic anhedral to sub-euhedral crystal measuring 1-2 cm. It occurs in hydrothermal veins and lodes that cut through brecciated and fractured gneisses, rich in zoisite, diopside, graphite, and quartz.
 
 
Micromount acrylic boxes measuring 28x28x22mm.