It's Sterling Silver 6mm each 925 Crystal CZ 2 Carat Total Weight Stud Earrings. Choose from 16 Colors Lime Green CZ COLOR 925 Sterling Silver Stud Earrings 6 mm round Each - Perfectly Matched Pair 2.00 Carat Total Weight - 1.00 Carat Each Stud Hypoallergenic Stud Earrings