A wonderful sterling ring featuring a "forma livre" (free-form) green tourmaline by Brazilian designer Burle Marx. It is a size 6- 6 1/4 but is plain in the back so could be sized. Weighing 14 grams, the face of the ring measures 1" long. Fine original condition with no chips or cracks to the stone. Burle Marx jewelry is highly sought after and has been the subject of several recent gallery exhibitions.