Handmade, natural product Stone: Genuine Sterling Green and Pink Opal. Metal: 925 solid sterling silver Gemstone size: 12mm X 9mm Classic Tourmaline Jewelry With Polished Finish, Sterling Silver Opal Ring With Bezel Setting, Sterling Silver Multi-stone Teardrop Ring, Silver Tourmaline Promise Ring, Silver Tourmaline Ring For Anniversary, Sterling Silver Gemstones With Natural Inclusions, Polished Tourmaline Ring As Gift, Silver Tourmaline Emerald Ring, Polished Tourmaline Rings For Gift