Antique Art Deco, rare, platinum, demantoid garnet and diamond plaque ringThis ring is sold, sorry. See similar rings: Metal: platinum rings Gems: diamond rings, garnet rings Type of ring: Art Deco rings Art Deco, diamond and demantoid garnet ring, circa 1920. An impressive and stylish ring set with old cut diamonds and tapered green garnets adorn the shoulders to add a touch of colour. The diamonds have a beautiful sparkle, all set in platinum with a fine millegrain finish. The shape of ring means it curves around the