December Birthstone Blue Zercon Color Earrings with Swarovski Crystal Set in Platinum. (P8052BZ) Brilliant Birthstone Colored Earring Set Designed by William Wang and Hand-Crafted in the USA. Radiant Round Cut Swarovski Elements Crystal Stone Shows stunning sparkle and depth. Measures .42 inch Diameter Beautiful Platinum finish is designed to look fantastic and last a lifetime. For Peacred Ears Only. Features 1/2 inch earlobe stud with push-back retaining clips. Matching Earring set for William Wang P8050 Birthstone Pendant Necklace