Blue Opal & CZ Powder Dolce Cabochon Ring in solid sterling silver. Material: Sterling Silver. Total metal weight: 1.5 gr. Round cut blue opal (5 x 5 mm) = 0.5 ct total. Round cut cubic zirconia (1 x 1 mm). Colour: Blue. Stone cut: Round Cut. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.