Polished Green Opal slab GRN87 polished Noreena Jasper Dimensions at widest points approximately

Dimensions at widest points approximately 105 mm x 80 mm x 6 mm thick

DO184  Dendritic Opal slab polished on one side

Dimensions approximately 150 mm x 110 mm x 90 mm thick

Dimensions at widest points approximately 110 mm x 70 mm x 55 mm thick

Polished Green Opal slab GRN87 polished Noreena Jasper Dimensions at widest points approximatelyGRN87 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 80 mm x 10 mm thick Weighs 171 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.