Tanzanite is a "new" gemstone, discovered in 1967 in Tanzania, and introduced to the world by Tiffany & Co. It quickly gained popularity as an alternative to Sapphire, since fine Tanzanites exhibit a similar color to fine Sapphires. Tanzanite is a purplish-blue gemstone, which can range in coloring from a light lavender or denim tone to a deep rich blue.

Sometimes used as the birthstone of December, Tanzanite is the blue form of the mineral Zoisite, which can be found all over the world. Only in Tanzania, however, does Zoisite appear with Tanzanite blue coloring. The finest Tanzanites are a dark blue-violet color, but this saturation of color is only apparent in stones over five carats.