Vintage Native American Turquoise Ring, Size 6

Beautiful Vintage Native American Turquoise (most likely Sterling Silver) Ring, Size 6 (possibly Navajo - Navajo jewelry often features heavy silver construction and larger stones, with techniques which includes leaf and scroll work being common.) Though unable to find a 925 stamp on the ring - the practice of hallmarking by Native American artists only became common in the 1970s and beyond. So the possibility that it isn't Sterling Silver is extremely low. Pre-owned by my friends 100 year old Aunt - beautiful condition, very little wear.