BEAUTIFUL VINTGE STERLING NECKLACE WITH SPRING RING CLASP 17 INCH NECKWEAR, MARCASITES, WITH OVAL SHAPE BEZEL SET GREEN CRYSTOPHASE STONE.  ON BACK VERY FAINT i CAN SEE SOME OF THE STERLING MARK.  MOSTLY ALL WORN OFF, WITH LOUP YOU CAN SEE  ST AND A LETTER G STILL VISIBLE.