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Tanzanite is the blue and violet variety of the mineral zoisite (a calcium aluminium hydroxyl sorosilicate), caused by small amounts of vanadium. [3] Tanzanite belongs to the epidote mineral group. 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 ...
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.
Tanzanite “Another beautiful blue-purple stone, the tanzanite is associated with spiritual connection and expression, as well as discovering one’s own truth,” Salzer says.
They also replaced December's lapis with zircon and switched the primary/alternative gems for March. 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]
Tanzanite was discovered in 1967 in Northern Tanzania. With its supply possibly declining in the next 30 years, this gemstone is considered to be more rare than a diamond. This type of gemstone receives its vibrant blue from being heated. [72] Hibonite was discovered in 1956 in Madagascar. It was named after the discoverer, French geologist ...
Jumanne Mhero Ngoma was born in the Same District, Kilimanjaro and relocated to the then-Arusha Region of Tanzania at an early age. [2]In January 1967, at the age of 28, Ngoma discovered tanzanite at the Mirerani hills in the Kiteto district of the then Arusha Region (presently Manyara Region).
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