Rare crystal pipe opal ring in 14K gold-fillThis handmade ring features two rare crystal pipe opals from Australia set in 14K gold fill. Gold fill provides a much thicker layer of gold than gold plated and should not wear off with proper care. Crystal pipe opal from Australia is highly coveted and not easy to get your hands on. Mother Nature only created pipe opals in small localized areas, so it can take several years or decades before more of it is found in large quantities. This means that