Heart Shaped Blue Opal & CZ Ring in solid sterling silver. Material: Sterling Silver. Total metal weight: 2.4 gr. Heart shaped blue opal (7 x 7 mm) = 1 ct total. Round cut cubic zirconia (1 x 1 mm). Colour: Blue. Stone cut: Heart Shaped. Occasion: Mother's Day. Anniversary: 14th Anniversary. Birthstone: October.