Vintage Black Onyx & Sterling Silver Marcasite Clasp Bail Necklace 8.5" Long

Vintage Black Onyx & Sterling Silver Marcasite Clasp Necklace Measures 8.5" long Elegant round black onyx necklace accented on the ends with marcasite. This necklace closes with a sterling silver marcasite removable bail clasp. Can be worn as a bail clasp in the back or as a pendant in the front. Add your own pendant for a different look. The silver on the onyx necklace does not show sterling silver marks that I can find. The clasp does show 925 (see pictures) Overall length is 8.5"