Vintage Sterling Silver MOP Marcasite Brooch & Matching Earrings. Brooch can also be worn as a pendant. In great condition. Hallmarked “925”. Brooch measures 1 3/4” by 1 3/8” and weighs 17.6 grams. Earrings measure 2 1/8” by 7/8” and together pair weighs 18.7 grams. Ships USPS first class from Virginia.