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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 ...
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).
Small-scale Tanzanian miner Saniniu Laizer struck a rare-gem lottery for the third time this summer, unearthing a 14-pound hunk of tanzanite worth $2 million. In June he had mined two stones ...
They have the ability to purchase large amounts of rough and have wholesale and retail distribution networks in place to facilitate the sale of loose tanzanite and finished jewellery. In August 2013 TanzaniteOne [4] announced they had opened an online boutique, www.tananiteoneonline, which sold tanzanite gemstones and tanzanite set gold ...
Bridges, originally from Scotland, lived in Kenya with his family and regularly mined for rare gemstones with his son Bruce Bridges. [2] The discovery of the green variety of garnet known as tsavorite and the importation of tanzanite into the west solidified his reputation and led to a consultancy with Tiffany & Co. in 1973. [3
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 ...
China is reportedly moving toward banning rare earth metal exports to keep high-tech advantages within the country.
A silicate mineral is generally an inorganic compound consisting of subunits with the formula [SiO 2+n] 2n−.Although depicted as such, the description of silicates as anions is a simplification.
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