14 karat gold plated sterling silver front back stud earrings featuring a 5mm x 10mm half moon bezel set black onyx on the post. The detachable back component features a curved bar with a 1.75" fringe drop made of 13 dangling cable chains. The back component can be worn with other post back earrings and you can wear the half moon black onyx studs independently. .925 Sterling Silver