Polished Green Opal slab GRN113 polished noreena Brockman in the Pilbara region

Brockman in the Pilbara region of Western Australia

Dimensions approximately 100 mm x 75 mm x 8 mm thick

Please note that pink opal is a very fragile stone with many unseen internal fractures

Weighs 889 grams

DO154 Dendritic Opal rough rock

Polished Green Opal slab GRN113 polished noreena Brockman in the Pilbara regionGRN113 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 150 mm x 100 mm x 11 mm thick Weighs 318 grams. Green Opal occurs at a location south of Kalgoorlie in the Eastern Goldfields of Western Australia. The green colouration is caused by traces of nickel and or chromium. Sometimes it exhibits striking contrasting veins of magnesite..