Vintage Sterling Silver Onyx Marcasite Pendant Necklace ETC9810

This is a vintage sterling silver pendant necklace. The pendant is set with a black onyx stone in the center and marcasite stones around the outside of the bezel. The pendant measures 1 3/16" long x 9/16" wide. The chain has little flat spots all along it to catch the light. The chain is 18 1/4" long with a secure spring ring clasp. The back of the pendant is marked A 925 TH. Total weight of the necklace is 7.6 grams.