Tanzanite, Gem Crystal, Tanzania
A beautiful gem crystal of purple Tanzanite from the Umba Valley, Arusha, Tanzania.
Tanzanite is a variety of Zoisite, a calcium aluminum silicate,
with a formula of Ca2Al3Si3O12(OH). The name is from it's type locality, Tanzania.
Measures 2.2 x 0.8 x 0.7 centimeters.
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