Tanzanite is one of the premier gemstones in the world. Its mineralogical name is “blue zoisite”, mineral with blue color. When Tiffany & Co became the main distributors, they named this gem-quality mineral by the world’s only known deposit in Tanzania, Africa. This gorgeous blue gem with high clarity is very rare, in fact, it is 1000 times rarer than the diamond. It is excavated in an area of only a few square miles on the slopes of mount Kilimanjaro….