Navajo handcrafted inlay ring. Set in solid sterling silver with genuine inlayed black fossilized wood. The medium width band measures only 1/4" and 3/8" in length. Blue cultured opal is used by the artist to create the diamond shaped pattern. It is a striking design. Please indicate your size when ordering. NAVAJO HANDCRAFTED INLAY RING Sterling silver (stars and setting): 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 standard has a minimum fineness of 925. Cultured opals (blue colored elements), often referred to as opalite, are created in laboratories. Pure opals that occur in nature take many years to develop. Mines of natural opals are found across the globe. In the Southwest United States, there are naturally occurring opal fields that are mined. Jet (black elements) is a product of high-pressure decomposition of wood from millions of years ago, commonly the wood of trees. Jet is found in two forms, hard and soft. Hard jet is the result of carbon compression and salt water; soft jet is the result of carbon compression and fresh water. Native American Navajo and Pueblo tribes of New Mexico were using regionally mined jet for jewelry and the ornamentation of weapons when early Spanish explorers reached the area in the 1500’s.Today these jet deposits are known as Acoma jet, for the Acoma Pueblo.