One of the prime reasons behind the skyrocketing popularity of Tanzanite crystals lies in their exquisite blue-purple color scheme. But how does it get its oceanic beauty? It's time to peek inside its mineral game that reveals many secrets for us. For example, Tanzanite 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.