Tanzanite jewelry is a variety of zoisite, a Sorosilicate mineral found in East Africa and a member of the Epidote family. Whereas the presence of Vanadium and Chromium is what gives your Tanzanite rings their classic blue or violet hues. Plus, these gems rank 6-7 on the Mohs scale of hardness, making them a pretty durable choice among fashion lovers. Like every other gemstone on earth, Tanzanite also has an astonishing history and rich folklore, making them different. It is interesting to know that tanzanites existed under the depths of the earth for millions of years, but they earned human attention in the later 1967.