Sterling Silver Judith Jack Faux Blue Stone Marcasite Necklace

Judith Jack sterling silver glam necklace with faux blue stone. I believe the "stones" are a combination of blue faceted plastic with abalone shell underneath with back painted black. There is some damage to the piece. There is a missing marcasite on the center focal but it's not really noticeable. The back of three "stones" look like someone did a hot pin test and pulled off some of the black coating revealing the abalone underneath. Still a beautiful solid piece. Necklace measures 16 inches length. Stamped with Judith Jack hallmark, 925, O, and acid tests positive for sterling silver. E