Tanzanite
As its name suggests, tanzanite is a product of Tanzania, where it was discovered in 1967, a blink of the eye in terms of geological time, and recent even by human-history standards. The gem's time to market was also speedy—by 1968, Tiffany & Co. had turned tanzanite into a must-have gemstone.
A vanadium-laced variety of zoisite, tanzanite sparkles purple-blue like a sapphire, although it is usually heat-treated to achieve this effect and...Continue Reading