Solid Boulder Opal set with anti tarnish sterling silver. This larger sized freeform shaped opal has an organic feel to the swirling pattern…. with glowing red, green and blue colours rolling across the opal on movement. The opal has a full silver surround and measures 23mm x 15mm, with a band design that graduates down to 3mm wide on the underside for comfort. The ring is a size 7.