Polished Green Opal slab GRN97. dendrites Dimensions at widest points approximately

Dimensions at widest points approximately 110 mm x 85 mm x 70 mm thick

Dimensions at widest points approximately 150 mm x 125 mm and 65 mm thick

Weighs 772 grams

TI263   Tiger Iron slab

Polished Green Opal slab GRN97. dendrites Dimensions at widest points approximatelyGRN97 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 115 mm x 70 mm x 12 mm thick Weighs 128 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..