Vintage Native American Indian large turquoise gemstone ring southwestern sterling silver gold flecks Signed size 5.75-6

Vintage Native American Indian large turquoise gemstone ring southwestern sterling silver Morenci? Signed WA sterling And has a few hallmarks that I Don’t recognize. This stone is a nice size please see photos for approximate measurements. The matrix has gold flecks, amazing. Double shank band.

Size is between 5.75 and six.