Overview Specs Documentation A bold play of color and organic elegance—this 925 Sterling Silver Boulder Opal Ring features a striking trillion-cut opal, rich with natural fire and earthy depth. Set in a clean, modern bezel, the one-of-a-kind opal shimmers with flashes of blues, greens, and golds, making this size 11 ring a true statement piece for any collection. 925 Sterling Silver Gemstone: Boulder Opal Ring Size: 11 (Resizing available upon request) Do you need a different size? If you need a smaller size, we offer a complimentary resize. If you need a larger size, please inquire with size via [email protected] for a quote. When you're ready for checkout simply specify your desired size. We will resize the ring and ship within 7-10 business days. BIRTHSTONES & ANNIVERSARIES Opal is an October birthstone and the 14 year wedding anniversary. MINERAL: Hydrated Silica CHEMISTRY: SiO2•nH2O COLOR: All colors REFRACTIVE INDEX: 1.37-1.47 BIREFRINGENCE: None SPECIFIC GRAVITY: 2.15 (+0.08, -0.90) MOHS HARDNESS: 5 to 6.5 If you need additional information regarding any of our gems or stones please contact us at: [email protected]