Jay King Mine finds DTR Frosted Faceted Rainbow Tourmaline 18-20.5 Sterling Necklace. Beads are graduated from approximately 5 mm to 8 mm. We are a storefront pawnshop. Jewelry descriptions are all provided by our on-site G. If a gemstone is listed as certain gemstone, then she provided the identification. If the mounting prevented proper testing procedure, then she lists that information as well. Additionally, all gold and silver is acid tested prior to listing. PLEASE DO NOT ASK FOR AN EXCEPTION. THIS PROTECTS US BOTH. Please allow 24 hours for a response. Check our other auctions for other great deals!