Antique Art Nouveau Figural 18K White Gold Angel Diamond Engagement Ring. The ring is in great antique estate condition and ready to wear. There was some damage to the filigree at the base of the ring that was repaired at one time. The ring is hallmarked 18K. The diamond is approximately .45 carats with Si2 color and J color. It is flanked by two standing Angel figures that are walking beneath it. The ring is a size 6.5, it stands about 5.5mm high off of the finger. It weighs a total of 2.5 grams.