This Queensland Boulder is set in Sterling Silver with a Red and Green Boulder opal rested in side the partially open setting. It is made to reveal the natural beauty of the opal. Striking colours in this opal are sure to keep you gazing into it weather worn on your own hand or as a gift for a loved one. The opal in this striking ring measures in at 20mm by 15mm. The ring size is P or 71/2 in the US gauge.