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In 2014 TanzaniteOne was sold to a private company, Sky Associates, who are now the current owners. The tanzanite resource is a long narrow area, divided into four blocks: named " A" to "D". TanzaniteOne Mining own the licence to mine the largest area Block C. Medium scale mining is undertaken by Kilimanjaro Mining in Block A and Tanzanite ...
Tanzanite is only found in Simanjiro District of Manyara Region in Tanzania, in a very small mining area approximately 7 km (4.3 mi) long and 2 km (1.2 mi) wide [4] near the Mererani Hills. [5] Tanzanite is noted for its remarkably strong trichroism, appearing alternately blue, violet and burgundy depending on crystal orientation. [6]
Zoisite may be blue to violet, green, brown, pink, yellow, gray, or colorless. Blue crystals are known under the name tanzanite. It has a vitreous luster and a conchoidal to uneven fracture. When euhedral, zoisite crystals are striated parallel to the principal axis (c-axis). Also parallel to the principal axis is one direction of perfect cleavage.
The American Gem Trade Association added tanzanite as a December birthstone in 2002. [5] In 2016, the American Gem Trade Association and Jewelers of America added spinel as an additional birthstone for August. [6] Britain's National Association of Goldsmiths created its own standardized list of birthstones in 1937. [7]
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Joe Kovach is trying to find the owner of a ring found among the debris left behind by Florida's two recent hurricanes. - Courtesy Joe Kovach
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