Antique Art Deco Onyx & Diamond Cocktail Ring 10k White Gold

This antique Art Deco cocktail ring features a rectangular black onyx centerpiece set in 10 karat white gold. A single cut diamond sits in one corner of the onyx, catching light against the dark, glassy stone. The diamond carries a J color grade, so it reads with a soft warm tint rather than an icy white flash, and SI1 clarity, meaning its inclusions stay hidden to the naked eye. Ornate filigree scrollwork wraps around the mounting, with fine milgrain beading tracing the edges for added texture. The rectangular shape sits low and flat against the finger, making it easy to wear for hours at a time. Deep black onyx against white gold gives the ring a bold, graphic look that stands apart from softer, rounded designs.