Rustic Petit Point Turquoise Ring in Sterling Silver Size 8

Vintage rustic Zuni petit point turquoise rosette ring. It is sterling silver with 6 stones that are accented with raindrops.

Size 8 and measures 5/8" in diameter. It is tarnished black and will polish up. I do see what looks like yellowed glue at the point of one stone.

No hallmarks. Acid tested.