This opal ring has a Boulder Opal matrix set with anti tarnish sterling silver. The opal has bright green and red colours glowing from the rich chocolate brown matrix ironstone. The colours dance across the domed surface of the opal on movement. Each piece of boulder opal matrix has its own unique picture. The opal measures 12mm x 10mm, the band tapers from 6mm wide beside the opal down to 3mm on the underside for comfort. The ring is a size 10.