Silver Black Onyx Marcasite Vintage Pendant from 1950 to 1960

This came from a woman who lived many years in New York. She purchased a lot of jewelry during her years in New York. She was a buyer for a very upscale department store in her younger years. This piece has no scratches that I can detect on the onyx piece! Rather remarkable given its estimated age. It measures (not including bale) 1.25 inches in length and .66 inches in width. The bales measures .5 inches. It is an amazing item. Notice the hidden cross on the back. It comes from my smoke free and pet free home.