Corundum var. Ruby in Zoisite Locality: Longido, Arusha, Tanzania Description: Superb hexagonal ruby crystal, the red-pink gem variety of the mineral species corundum, in green zoisite matrix. The ruby crystal has exceptionally rich color and runs completely through the matrix. From the Online Mineral Museum
In October 2002, Tanzanite was added to the official birthstone list by the American Gem Trade Association. Tanzanite was first discovered in 1967 in Tanzania, East Africa. As one of the newest and most exotically colored gemstones, Tanzanite is part of the Zoisite mineral species and is only found in East Africa. Tanzanite is very rarely a pure blue and usually exhibits rich purple overtones.