Created Blue Opal Nautical Starfish Sterling Silver Ring This inlay-ed synthetic blue opal starfish ring is 19mm of oceanic fun. This sterling silver sea stars is the perfect addition to your jewelry box. Stone: 4mm L x 4mm W Measure: 19mm Weight: 4.1 grams Material: .925 Sterling Silver, Opal, Rhodium plating Measure: Weight: 4.1 grams