Carolyn Pollack white stone 925 pendant

Very good condition. Marked 925, CP and brass. The brass is primarily on the back. See pic with quarter for size comparison. No chain included. I used an app to determine the type of stone. It showed this to be a white opal. Other stones could be mother of pearl or white agate. I have found it accurate most of the time but please use your judgement on the stone type. #114