Dormith&reg; 925 Sterling Silver Synthetic White Fire Opal 3mm Rings for Women (7) Dormith Fashion Women's 925 Sterling Silver Charm White Fire Opal Rings (7) Material: pure 925 sterling silver.Synthetic opal;Excellent crafts and materials show a top quality Ring size: 22.5*18.5*3mm.total weight: 2.73g. Tarnish-free and anti-allergic, lead-free. Guaranted authentic, money-back satisfaction guaranted by Dormith. Desinged by Dormith.makes your life more beautiful.