The beautiful Original Star K™ Round 7mm Created Opal Earring Studs, crafted in .925 Sterling Silver. This attractive design is set with 2 stones prong set white iridescent Round Created Opal. This design measures 7.00 mm wide, 7.00 mm long. Opal is October Birthstone: From the Greek “opallios”, meaning “colour change”. A symbol of hope and faithfulness, it inspires true love and brings confidence. And buy this Original Star K Round 7mm Created Opal Earring Studs Now $31.99.