Add a gorgeous pop of aqua blue to your look with this stunning Marc round blue agate ring. The serene stone is beautifully framed by a pave marcasite border. This classic piece is finished with a polished sterling silver band. \r\n\r\n. \r\n Diameter: 1 inch. \r\n Metal: Sterling silver. \r\n Stone: Blue agate, marcasite. \r\n.