This is a beautiful mabe' pearl and marcasite sterling silver brooch. It is signed Judith Jack with the JJ in triangles logo and Sterling. The brooch measures 2-1/8 inches by 1-1/2 inches. It weighs 22.2 grams. The marcasites appear to be prong set. The brooch is in very good condition with no missing stones and appears to have been gently worn, if at all. The only problem I could find is that the back could use polishing. Please let me know if you have any questions. Thanks for stopping by.