Shop › Lab grown blue Opal sterling silver stud earrings Image 1 of 3 Image 2 of 3 Image 3 of 3 Lab grown blue Opal sterling silver stud earrings $14.00 Blue Opal (man made) round sterling silver stud earrings. Studs measure 4.5mm Add To Cart Added! Blue Opal (man made) round sterling silver stud earrings. Studs measure 4.5mm Reviews Reviewer Name Review Date Star Rating Description Posted on Etsy Product Show More You Might Also Like Blue Chalcedony gold earrings $42.00 Tourmaline in Quartz and Hypersthene earrings $38.00 Moonstone gold filled earrings $35.00 Agate slice silver earrings $38.00 Tibetan Quartz sterling silver studs $32.00