Blue Opal Hoop Earrings in solid sterling silver. Size: 25.4 x 25.4 mm (1 x 1 in). Material: Sterling Silver. Total metal weight: 10.0 gr. Round cut blue opal (5 x 5 mm) = 2.5 ct total for pair. Colour: Blue. Stone cut: Round Cut. Anniversary: 14th Anniversary. Birthstone: October.