1940's Native American Bisbee/royston turquoise sterling pin

1940's Native American Bisbee/royston turquoise sterling pin. Nice large pin with high grade turquoise cabochons. Piece has a lot of character. 2.25" wide x 2.5" tall 12.4 grams. All precious metals are tested and guaranteed, any Native American jewelry referred to as Silver or Sterling is guaranteed to be a minimum of 90% (coin) silver and possibly higher content.