Deep Blue Turquoise with Quartz Inclusions Ring in Sterling Silver Size 7

Vintage Southwestern sterling silver ring set with a natural deep blue turquoise stone that has large quartz inclusions. Stone is likely from the Kingman mine. 

Shank is carinated in shape.

Size: 7. Face measures 1" long. Weight: 6.7 grams. Tarnished. Has a rustic bezel solder. No hallmarks. Acid tested. C. 1960.