Measuring over 1" 1/2 in length by 5/8" in width. The detailed setting has notched edges on one side that frame the inlay. The bail is large enough to accommodate up to a 5mm chain or beads.The Night Sky design has been inlayed perfectly and raised slightly to give it dimension.Signed by the artist Marty Yazzie NAVAJO HANDCRAFTED SMALL OVAL NIGHT SKY JEWELRY COLLECTION: Inspired by the clear dark night skies of the Navajo Nation. The Black you see is called "JET "and is a fossilized wood, which has been compressed over millions of years. Multiple pieces of stone make up the mosaic image. The stars are made from pieces of silver and the larger star and moon along with the shooting star are made from Cultured Opal. 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 (white 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.