Zuni Rosette Ring in Sterling Silver with Petit Point Turquoise Size 8

Vintage Zuni sterling silver rosette ring set with petit point turquoise from the Sleeping Beauty mine. Center stone look chipped, but it is not. It has a natural indentation on part of the edge. 

Ring is a size 8 Face measures almost 7/8" in diameter. Very tarnished. No hallmarks. Weight: 4.4 grams.