Cut and polished, ready to Set. Boulder opal is found in an area that was the edge of a mighty inland sea and where once there was lush vegetation and dinosaurs roamed. Over time the sea evaporated and left behind the opal, filling the voids in rocks over millions of years. When the rocks are extracted from the earth they show little of what lies inside and only when you break them open do they reveal their true beauty.
Size in mm: 22.4mm 10.8mm x 3mm (thick). Been enlarged to show detail. Please refer to measurements for actual size. All our opals are sourced directly from the mines and we guarantee all our items to be exactly as described, genuine, natural and untreated. We endeavour at all times to take the most true to life pictures possible.Please have a look at other similar items in our store. The item "Australian Opal, Lightning Ridge Black Opal Solid Polished Natural Gemstone 8169" is in sale since Monday, April 10, 2017. This item is in the category "Jewellery & Watches\Loose Diamonds & Gemstones\Loose Gemstones\Opal\Black Opals". The seller is "boulder-opal-wholesalers-qld" and is located in Eumundi , Queensland. This item can be shipped worldwide.