This thin band style ring is set in solid sterling silver. Navajo crafted. Genuine black jet and cultured opal. The slight wave in the rings shape is inlayed with a Night Sky design. Measuring only 1/16" in width this is a small ring. Easily worn with other rings or alone, this is a beautiful ring. It is currently a size 6-1/2 and we are able to adjust the rings size up or down 1 size. Complete with a certificate of authenticity along with our limited lifetime warranty. NAVAJO CRAFTED INLAY RING WITH WAVE DESIGN 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 iridescent strips are made from Cultured Opal.