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tanzanite

mineral

Learn about this topic in these articles:

characteristics

In zoisite
Tanzanite, a gem variety from Tanzania, is vivid blue. Zoisite has the same chemical formula as clinozoisite but has a different crystal structure. All varieties of zoisite have an orthorhombic crystalline structure, which is characterized by three mutually perpendicular axes that are unequal in length.…
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