Kunzite was named after a former Tiffany & Co. vice president, famed mineralogist and jeweler George Frederick Kunz, who first catalogued the stone in 1902. It is a variety of the silicate Spodumene, and forms naturally as a glassy, transparent stone. It can be colorless, pink, lilac, yellow or green, with darker shades being higher in value. Kunzite is prone to fading in direct sunlight.