Tanzanite - variety of Zoisite with purple/blue color.
Location: Merelani Hills, Simanjiro, Manyara, Tanzania.
Translucent prismatic sub-euhedral crystal measuring 1.5 x 1.2 x 1.0cm. It occurs in hydrothermal veins that cut brecciated and fractured gneisses, rich in Zoisite, Diopside, Graphite and Quartz.