Authentic Indian turquoise ring. I think Navajo

Authentic Indian turquoise ring. I think Navajo this was mu Aunt's from Mesa Az. she collected and wore alot of Native jewelry. My uncle in the 50s to the 80s did masonry work for many of the Indians in AZ and they paid alot the time with the jewelry because my aunt loved their work. it is stamped in the back looks like a V. I dont have any other history on her jewelry I just several pieces when they both passed. this is beautiful but not my style. large piece of turquoise, lovely feathers. size seems to be a 6& 1/2