Tanzanite is a blue and purple variety of the mineral zoisite discovered in the Mererani Hills in northern Tanzania. When the material is any other color, aside from blues and purples, it is often called fancy colored tanzanite, such as this fine matching pair. This particular pair has a total weight of 3.77 cts. and each measure 8×6 mm. We go directly to the source to bring you this one of a kind material.