A Navajo bracelet with Royston Turquoise and silver sterling by Calvin Martinez(b. 1958). He learned how to make jewelry from his parents. All his pieces have been blessed and give prosperity to the wearer. The stone is natural and has brown matrix. The silver has buttons with swirls. It measures 6 1/2 inches in circumference with a 1 1/8 inch opening. The hallmark: CMTZ in an arrowhead.