Type of Main Stone: Natural Mined Green Turquoise. Country of Mfr: USA. Ring Size (Sizable): 7.0. 925 Sterling Silver & Gemstones. Main Stone Length (mm) : See Pics. Main Stone Width (mm) : See Pics. Band Width (mm) : 2.7. Gram Weight (grams): 7.3. This elegant Native American Ring will make a great addition to your fine jewelry collection.