This one of a kind Art Deco period ring by Ostby Barton features an emerald cut natural Rose de France amethyst gemstone low set into a 14k gold filigree setting with intricate web style engraved shoulders. This ring is a size 5.5, weighs 2.2 grams and the head measures 11mm wide. It is in good antique condition with surface wear to the stone and is marked as shown.