Mottled Lime Green Turquoise Ring in Sterling Silver

Vintage Southwestern ring set with a natural turquoise stone that has a mottled lime green and turquoise color. So unusual. Ring is of very simple design with twisted wire bar appliqué.

size: 6 1/4 Face measures 3/4" by 5/8". Weight: 5 grams.  No hallmarks. Likely Navajo. Acid tested sterling. Very tarnished. C. 1950s.