Beautiful Hopi style overlay cuff, possibly by Robert Johnson (see hallmark) who is Navajo. Stone resembles Bisbee.
Signed: RJ (with sunburst)
Stone: Natural turquoise
Metal purity: Marked "sterling" and tested positive for sterling silver.
Weight: Approx 31.5 grams
Measurements: Approx 5 5/8 inches measured along inside from tip to tip; 7/8 inch gap; 5/8 inch width.