Polished Green Opal slab GRN105 Opalite Dimensions at widest points approximately

Dimensions at widest points approximately 145 mm x 130 mm x 50 mm thick

Dimensions at widest points approximately 130 mm x 100 mm x 70 mm thick

140 mm x 100 mm x 35 mm thick

CH424  Chrysoprase nodule

Polished Green Opal slab GRN105 Opalite Dimensions at widest points approximatelyGRN105 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 140 mm x 80 mm x 12. 5 mm thick Weighs 224 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..