Early Navajo Sterling Silver Ring with Natural Green Turquoise Size 6 1/4

Early Navajo hand made ring that is set with natural green turquoise. The ring is hand formed and the shank has cold chisel splits. The twisted wire swirls are appliqué. Size 6 1/4. Face measures 5/8" wide. Weight: 6 grams. C. 1920-1930. No hallmarks. Acid tested.