Vintage sterling silver Navajo ring. This is set with a single oval green turquoise stone with prominent chocolate brown matrix. Likely KIng's Manassa Mine. Framed in twisted wire rope and a rolled edge that is knife edge stamped. 

The shank is hand pulled, hammered and cold chisel split.  size 5 1/4 Face measures 15/16" long. Weight; 5 .9 grams. 

🦋 Note: This has been left in original patina and condition. This means that it is  tarnished, may have crusty old silver polish, verdi gris and general grunge. My sophisticated collectors sternly request that I do not polish or clean these early pieces leaving the patina as found. I agree with them. Once you clean away the patina, you cannot put it back.

However, if you like your jewelry shiny and new, you can clean it with a soft toothbrush and a little water keeping in mind that the stones are usually not glued in place and if so it was done with tree pitch and not modern glue, so clean with care. It will polish up, but take care to not remove all of the patina.