Tanzanite is found in only one place on earth, deep in the foothills of Mount Kilimanjaro in Tanzania, East Africa. The entire area mined is only four square kilometres wide. Intense geological research has shown Tanzanite’s geology to be totally unique. The chance of it occurring outside the current production area (and its immediate vicinity) is less than a million to one.
So Tanzanite is rare in both a gemmological and geographic sense. In fact, its single source and limited supply makes it at least one thousand times rarer than a diamond.
