Old Triangular Turquoise Navajo Ring in Sterling Silver Size 10

Old 1940s Navajo ring with a blue turquoise stone that has some spider webbing. The stone is triangular in shape; which is hard to find. The shank is hand hammered and not a perfect circle. Size 10. Face is 3/4" long. Weight: 4.2 grams. tarnished. No hallmarks. Acid tested