Jet or black Onyx was used in just about every Native American tribe that fashioned jewelry. It is the most uncommon of the Onyx family. This bracelet weights 67.9 grams with an enormous single black Onyx measuring 1&7/8" tall by 1&3/8" wide in a silver bezel setting. The inside circumference is 6&3/4" which includes the gap. It has slight patina but is in excellent condition. It is designed by Native American, J.Nelson. He is of Navajo ancestry and his work first appeared in 1974. It is hallmarked and also stamped "STERLING" Thank you for visiting our Lane.