3 Polished Australian Boulder Opals stunning 48CT, These gemstones have been hand-crafted and are 100% natural, with no treatment or enhancements. The ideal cut grade and polished form make this gemstone a truly unique addition to any collection, this Boulder Opal is a one-of-a-kind find. Whether you're a collector or looking for a special piece of jewellery, this gemstone is sure to impress. Postage is combined for your convenience.