Natural Polki Diamond Sterling Silver Trilogy Ring SZ 8 NWOT Every glistening polki diamond, rich in its raw and natural form, showcase an old-world charm and pure brilliance that's been cherished for ages. Crafted in sterling silver stamped 925 the stones are securely held in place with meticulous bezel settings. Polki diamonds are uncut, unpolished and unfaceted and give off a much softer sparkle. In the tradition of the trilogy ring, the three stone design stands for the past, present, and future.