Celtic Knot Infinity Design Blue Simulated Opal Ring .925 Sterling Silver Sizes 5-10 PURE 925 STERLING SILVER  Crafted to stand the test of time. Sterling Silver is 92.5% silver, mixed with alloys to add strength and durability. SATISFACTION GUARANTEED  We promise superior service which includes fast shipping, great communication, and Amazon's refund policy. QUALITY  All jewelry is new and inspected for quality assurance. SHIPS FROM THE UNITED STATES  All Sac Silver distributors ship from the United States to ensure quality, reliability, and punctuality.