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The Merelani tanzanite mines: Lelatema Mountains, Arusha Region, Tanzania.(Famous Mineral Localities:): An article from: The Mineralogical Record [HTML] [Digital]

Wendell E. Wilson , John M. Saul , Vincent Pardieu , Richard W. Hughes

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Excerpt. © Reprinted by permission. All rights reserved.

Since their discovery in the 1960s, the Merelani tanzanite deposits have produced countless thousands of beautiful crystals of gem-grade zoisite in a range of colors, including the coveted deep purplish blue material called tanzanite. Other highly attractive minerals have been found there as well, including chromium-green diopside, the green tsavorite variety of grossular, blue apatite-(CaF), gemmy grass-green tremolite and the new species magnesioaxinite-since renamed axinite-(Mg). Despite decades of intensive mining, the deposits continue to produce superb specimen crystals and gemstones. New reserves have been discovered in recent years, and the color of the tanzanite crystals appears to be improving with depth.


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