Vintage Green Nodule Turquoise Ring in Sterling Silver Size 7

Vintage Navajo sterling silver ring that it set with a natural and rare apple green nodule turquoise stone. The stone is set in a plain bezel and has twisted wire rope trim with crowns of raindrop rows at top and bottom. Hand wrought shank with a cold chisel split. 

Size 7 and measures 7/8" long. Weight: 6 grams. No hallmarks. Acid tested.