Tanzanite is a variety of the mineral zoisite belonging to the epidote group.
Tanzanite is a variety of the mineral zoisite belonging to the epidote group. It’s name was given because the only known tanzanite deposit is in northern Tanzania, i It’s noted for its strong blue colour, although Tanzanites are also commonly found in purplish blue and violetish blue.
Despite only being discovered in commercial quantities in 1967, Tanzanite has become the second most popular blue gem after sapphire. For the untrained eye, Tanzanites can often be confused with Sapphires due to colour similarities.
It has a Mohs rating of 6.5 on the hardness scale and known for its reflective surface and remarkably strong trichroism.