Perfect ring for the man who loves the sea. Nautical design complete with anchor and compass. Pure silver with protective rhodium. Hypoallergenic and sweatproof. All stones are prong set. Comfortable to wear with no sharp edges. .80 apatite stone is the most vibrant blue. Think of one of the colors of the Caribbean. It's similar to blue topaz but has much more sparkle and personality. May be sized up or down. Ocean, tropical, boating, yachting, beach themed.