Uniquely design cuff bracelet by artist Bernyse Chavez. Set in solid sterling silver. Outstanding details of feathers and arrows are seen throughout the bracelet. Genuine Royston Turquoise and orange spiny oyster shells. Measuring 1"1/2 in width. Complete with a full Certificate of Authenticity NAVAJO HANDCRAFTED CUFF BRACELET Royston Turquoise: The Royal Blue. Royston is known for its beautiful colors ranging from deep green to rich, light blues which are set off by a heavy brown matrix. The Royston mine is producing a little high-grade turquoise today, operated by the Ottison family. They process most of their material into finished cabs and allow very little rough to come onto the market. This controlled output has raised the price of this material considerably in recent years. Spiny Oyster Shell Living Spondylus shells are, indeed, very spiny, but the polished product looks very smooth. The Orange Spiny Oyster occurs in shallow to moderately deep waters, where snorkelers and scuba divers readily harvest them