Vintage Brutalist Modern Dutras Brazil Brass outlet & Raw Amethyst Ring

Awesome vintage ring from the 60's. Brutalist modern style. It is not marked, but is absolutely a Dutras, Brazil, piece. outlet Feel free to look up and compare. Made of brass in a folded and crumbled design with a raw amethyst stone in the front. It is somewhat adjustable as the back is made open, but I wouldn't consider bending and re-bending over and over, as all metal will weaken with continued bending. It currently fits a 5-6 with no problems. Excellent condition with patina to the brass.