Polished Green Opal slab GRN105 Opalite OJ182 A rough rock

OJ182  A rough rock

DO189  Dendritic Opal slab polished on one side

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

Weighs 532 grams

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

Polished Green Opal slab GRN105 Opalite OJ182 A rough rockGRN105 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..