Old Navajo Cuff Bracelet with Triangular Royston Turquoise in Sterling Silver

Vintage sterling silver cuff bracelet that has a Navajo hallmark on the back. The stone is a natural turquoise stone from the Royston mines. During the 1970s Royston we producing specimens with this light aqua color and mottled matrix and no green. The triangular shape is a plus as well, not a common shape. Cuff is simple, but hand stamp decorated. There is a stamped raindrop at each split. Classic early 1970s piece. 

Interior measures 5 1/4" plus the opening of 1". It is 1" wide. Weight: 18.8 grams. Acid tested.