Simulated Blue Topaz December Birthstone CZ Stud earrings Rhodium Plated 10mm These CZ earrings have a clear jacket that can be added for a night out or taken off for a day at the office. These blue studs are perfect for people with pierced ears and December babies. Measure: 13mm x 10mm, Weight: 4.5 Grams, Material: Brass, Rhodium Plating, Cubic Zirconia.