Tanzanite was first discovered in 1967. There is a theory that it was accidentally discovered by Maasai tribesmen in the Merelani Hills of northern Tanzania, Africa. Because it resembled blue sapphire, it was initially hoped that a sapphire deposit had been found. However, when gemologists examined the crystals, they found that they were blue-colored zoisite. In the trade name Tanzanite, it is known as blue zoisite as a mineral. For a while after the discovery of Tanzanite, its value was not recognized. However, Tiffany & Co. in New York recognized the value of the beautiful and vivid colored crystals and became a major distributor, which suddenly brought it into the spotlight and made it known to the world. The name Tanzanite was also given by Tiffany, from the color of the ore resembling the Tanzanian night sky and as a tribute to Tanzania, the place of origin. It became a hit in the United States in the 1980s and became recognized worldwide. Tanzanite exhibits pleochroism, appearing more blue or purplish depending on the viewing angle. This ring has excellent transparency and allows you to see the pleochroism! The pink gold finish enhances the color of the Tanzanite. Size: Stone size: Approximately 5.1 x 4.3mm Silver 925 K18 coating Free size