Tanzanite; 1,000 times rarer than diamonds. Tanzanite is the blue/violet variety of the mineral zoisite (a calcium aluminium hydroxyl Sorosilicate) belonging to the epidote group. It was discovered in the Mererani Hills of Manyara Region in Northern Tanzania in 1967, near the city of Arusha and Mount Kilimanjaro. Tanzanite is used as a gemstone, and … Continue reading Tanzanite Gem Stone from Mount Kilimanjaro in Tanzania, East Africa.