Large Spider Web Turquoise Ring in Sterling Silver Navajo Size 7

Vintage Navajo wrought silver ring. The setting is kind of a free-form design with a large raindrop. Stunning stone is set in a plain bezel. The turquoise stone has the attributes of the Red Mountain mine with its rusty red spider web matrix. The stone measures 22mm by 17mm. It is a size 7 and the face measures 1 3/8" by 1". It weighs 11.6 grams. No hallmarks. C. 1970.