VINTAGE CLEAR GLASS CRYSTAL CAMEO INTAGLIO ETCHED PENDANT SILVER TONE METAL

THIS IS AN AMAZING VINTAGE FIND !!! I AM UNSURA IF THIS FACETED ETCHED INTAGLIO PENDANT IS MADE OF CLEAR GLASS OR CRYSTAL ( OR EVEN POSSIBLY ROCK CRYSTAL?), BUT ITS SUPER NICE EITHER WAY !!! DONE IN SILVER TONE METAL. I ALSO CANT BE CERTAIN, BUT TO ME THIS PIECE LOOKS LIKE A CONVERSION PIECE AND ITS POSSIBLY WAS PART OF A LARGER JEWELRY PIECE IN ITS PREVIOUS LIFE. I WILL LET THE NEW CARE TAKER TO DECIDE IF I AM CORRECT.