They have post with friction backs.
4 Carat Pink Cubic Zirconia Stud Earrings in Sterling Silver by SuperJeweler.Gorgeous pair of pink cubic zirconia earrings perfect for everyone! - Lifetime Guarantee - 60 Day Worry-Free Return - 4 Carat Pink Cubic Zirconia Stud Earrings in Sterling Silver by SuperJeweler These earrings have the look of a 4 carat pair of pink diamond stud earrings. The earrings are crafted in solid sterling silver.