Polished Green Opal slab GRN109 polished magneprase Rough Lime (Nickeliferous) Magnesite nodule

Rough Lime (Nickeliferous) Magnesite nodule

Dimensions approximately 85 mm x 85 mm x 70 mm thick

Dimensions at widest points approximately 245 mm x 200 mm x 13

Weighs 435 grams

Dimensions at widest points approximately 130 mm x 110 mm x 80 mm thick

Polished Green Opal slab GRN109 polished magneprase Rough Lime (Nickeliferous) Magnesite noduleGRN109 Green Opal slab, cut and polished on one side . Dimensions at widest points approximately 95 mm x 70 mm x 11 mm thick Weighs 144 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.