Measuring 1"5/8 in width, this is a wide bracelet. The inside measurement is 5"1/4 with a 1" 1/4 opening. 3 large oval black onyx stones make a strong statement with the smaller oval stones as end caps to the layout. The Navajo artist is Albert Jake. His use of straight line stamping along with a unique diamond design are stunning. Easily shaped to fit most wrists. Onyx is a chalcedony quartz that is mined in Brazil, India, California, and Uruguay. It has a fine texture and black color; however, some onyx also displays white bands or ribbons against a black or brown background and this variety is known as sardonyx. The name comes from the Greek word onyx. Oxidized silver (black coloring in the silver) is a process that many jewelers use to give sterling silver a black patina. It gives the jewelry an antique or tarnished look. The process consists of taking clean sterling silver and using a chemical (liver of Sulphur) to treat it to speed up the tarnishing effect. Sterling silver Is an alloy of silver containing 92.5% by weight of silver and 7.5% by weight of other metals, usually copper The sterling silver has a minimum fineness of. 925