This opal ring has a Boulder Opal matrix picture stone set with anti tarnish sterling silver. The opal has bright turquoise colours mixed with the beautifully patterned natural dark chocolate brown matrix ironstone. Each piece of boulder opal matrix has its own unique picture. The opal measures 20mm x 15mm and is set with the highly polished (anti tarnish) sterling silver formed wrapping up around the opal. The band tapers from 15mm wide beside the opal down to 5mm on the underside for comfort. The ring is a size 12.