Type of Main Stone: Natural Mined Blue Turquoise. Secondary Stone: Malachite, Opal, Onyx, MOP, Oyster, Coral. Country of Mfr: USA. Ring Size (Sizable): 13. 925 Sterling Silver & Gemstones. Gram Weight (grams): 21.3. This elegant Native American Ring will make a great addition to your fine jewelry collection.