This solid Boulder Opal matrix has red , green and pink colours sparkling from the deep chocolate brown ironstone. The opal has been shaped with a high cabochon to feature the beauty of the matrix opal , it measures 15mm x 9mm. The ring is set with 14ct yellow gold , the band measures 8mm wide beside the opal , tapering down to 3mm wide on the underside. The ring is size 6.5