14k Yellow Gold Antique Black Onyx Cabachon Art Nouveau Ring Size 6.25. This ring is an antique and has some signs of obvious wear, please look at the photos closely. There is evidence of ring resizing to the back of the ring. Certainly adds to the charm of a ring that is over 100 years old! 14k yellow solid gold. “14k” is stamped on the inside of the band. Onyx cabachon measures 5x3.4x4.3mm