Type of Main Stone: Natural Mined Blue Turquoise. Country of Mfr: USA. Ring Size (Sizable): 8.5. 925 Sterling Silver & Gemstones. Brand / Artist: Mike. Main Stone Length (mm) : See Pics. Main Stone Width (mm) : See Pics. Band Width (mm) : 4.3. This elegant Native American Ring will make a great addition to your fine jewelry collection.