Art Deco 1.15 Carat Ruby & 0.90 Carat Diamond Three Stone Ring, circa 1935A dream of a ring. This vintage ruby and diamond three stone features a certified natural and untreated berry red ruby in a platinum coronet setting, flanked by a pair of white and bright old mine cut diamonds (also in platinum), leading to a slim and tapering 18k yellow gold shank. Currently size Q 1 2 (UK) or 8. 25 (US). Free sizing available. Accompanied by a ruby report from The Gem & Pearl Laboratory stating the ruby shows no evidence of heating.