Tanzanite is the purplish blue variety of the mineral zoisite that was found for the first time in 1967 and named after the East African country of its birth by Tiffany & Co. of New York, which introduced the gemstone to the world market in 1969.
Its rich purple and blue often has a depth comparable to the finest sapphire.
When tanzanite is found in the ground, the brown color dominates. However, with gentle heating, the cutter can watch the blue color bloom and deepen in the stone.
Tanzanite is more delicate than other gemstones and should not be set in a ring that will be worn during strenuous activity.
Never clean tanzanite in an ultrasonic cleaner.