This lovely pendant is made with Tourmaline gemstone and white zircons, all natural stones mined from earth. A good buy, considering that a 925 Sterling silver (with white gold plated) is 80% cheaper than a 18k white gold. Items are verified by GIA certified gemologist & 100% authentic. You may bring it to Gemological Laboratory to certify. A full refund for the item & certificate if item is not 100% authentic. Tourmaline is the most colorful of all gemstones. It occurs in all colors, but pink, red, green, blue and multicolored are its most well-known gem colors. Scientifically, tourmaline is not a single mineral, but a group of minerals related in their physical and chemical properties. The mineral Elbaite is the member of the Tourmaline group that is responsible for almost all the gem varieties.