These vintage style diamond stud earrings are set with 2 diamond weighing 0.40 ct. They weigh between 0.38 and 0.42ct tw. They are G-H color. The mountings are made from genuine antique style molds. It is virtually impossible to distinguish these from genuine antiques. The earrings have posts with friction backs, and screw backs are available as a special order at an additional cost.