Zultanite: Transparent or Cat's Eye with natural color change ability from champagne tones (indoors with regular household lighting) to kiwi tones (outdoors or indoors with LED or fluorescent lights) to raspberry tones (in candlelight or other low lighting). It is a relatively new stone and come from only one source in the Anatolian mountains of Turkey. It is named after the 36 Sultans who ruled the Ottoman Empire in the 13th Century.