Vintage Gold Filled and Smokey Quartz Woman's Adjustable Ring

This is a well made ring of 12K gold-filled metal. The shank is squeeze-adjustable with split shoulders, oval bezel-set faceted smokey quartz stone and a twisted rope border. The stone and setting measure 3/4" x 1/2" with the signature G 1/20-12K G F. on the reverse side of the stone setting and 1/20 12K GF © on the inside of the band. The condition is excellent.