Watermelon Tourmaline lab grown and sterling silver 925. Size: 3.7 cm x 4.0 cm Weight: 26.2 gram Tourmaline derives from the Sinhalese term "turamali", which translates as "stone of mixed colors". The very name refers to the unique spectrum of colors displayed by this gemstone, which is second to none in the realm of precious stones. One of the most versatile of gemstones, tourmaline is available in every color, from colorless to black. It can show every tone from pastel to dark, and can exhibit various colors in the same stone. Natural Tourmaline Gemstones is expensive, and now there's a new and best substitution--Glass Tourmaline Color Gemstones, which the color is more beautiful look then the real Natural Tourmaline, and the price is very cheap. Shipping registered.