These have a stud post with a butterfly back.
Material: 14KT Gold plated over 925 Sterling Silver, CZ
Clover Studs 2.0 - 6 Color Options
Clover Studs 2.0 - Large - 5 Color Options
Mother of Pearl Heart Studs - Gold or Silver
Mother of Pearl Butterfly Studs
Pave Clover Stud Earrings