Early Navajo Turquoise Red Coral Signet Ring Sterling Silver

Sterling Silver signet style Navajo ring. Sand cast with great casting marks inside. No hallmarks. Set with turquoise and blood red coral. Bezel is hand notch fitted in a very rustic way. The ring has two hand dropped raindrops. 

Size: 10 1/2

Face measures 1" wide. Weight: 16 grams. Very tarnished to a gunmetal gray. Acid tested for metal purity.