This is from a DC Metro Estate. Posted here is a much sought after ART DECO PLATINUM DIAMOND RING with ONYX Accent Stones. The DIAMOND is One Carat, European Cut, S13 I1 Clarity, HI Color.
Surrounding that Diamond are Multiple Faceted Onyz stones.
Also note: this Ring was purchase with a Matching Pair of PLAT DIAMOND EARRINGS. See subsequent jpgs