Synthetic Opal: 7mm x 9mm set in a rope edge setting. * Adjustable 3mm Ring Shank. * Fits Ring Sizes 5 6 7 8 9 10 * Handcrafted In Taxco Mexico by skilled fair trade artisans. * Lead Free, Nickel Free, Hypoallergenic. * Baked lacquer finish to protect metal from turning or tarnishing. Alchemia or "Zero Karat Gold" infuses a blend of base metals to simulate the look and feel of 18K gold, but with an affordable price. Alchemia is not plated so the color is through & through. Comes with branded jewelry pouch, care card, polishing cloth & a sweet little acrylic candy shaped gift box. See my Opal Sun necklaces! Charles Albert Alchemia Gold Ruby Red Lab Created Opal Adjustable Rope Ring Other colors are available.