Early Navajo Turquoise Row Ring in Sterling Silver Size 5 1/2

Vintage Navajo sand cast sterling silver ring. It is set with three turquoise stones in a row. Has filed decorations on the edges and hand dropped raindrops. Size 5 1/2. Weight: 7 Very tarnished and has spots of old silver polish. Needs to be cleaned. Marked sterling inside. Very rustic. C. 1935.