Vintage Kuchi tribal ring with an agate setting. I think the setting is most likely a replacement. The bezel has about a .4" profile. The ring is a size 9 US and does not adjust. This style of ring is a traditional Afghan design. This is a vintage piece of jewelry. There are visible signs of age and wear, including rounded edges and patina. The metal is a champagne-tone - neither completely silver nor golden in color - made of an alloy.