Native American and Southwestern Jewelry

lot of 3, includes:

a heavily stamped example set with a single turquoise cabochon; marked STERING L JUAN
width 1-1/2 inches, interior circumference 5-5/8 inches + gap length 1 inch, weight 27.3 dwt.

another set with a row of five turquoise stones; marked STERLING RD
width 13/16 inch, interior circumference 5-1/2 inches + gap length 1-1/8 inches, weight 30.7 dwt.

the last, an unmarked example with Peyote bird designs
width 1 inch, interior circumference 6 inches + gap length 35.6 dwt.