Polished Green Opal rock GRN103 alcheringa narrina Dimensions at widest points approximately

Dimensions at widest points approximately 105 mm x 95 mm

Dimensions at widest points approximately 110 mm x 70 mm x 80 mm thick

From our mining claim at Mooka Creek close to the Kennedy Ranges

190 mm x 90 mm x 10 mm thick

Polished Green Opal rock GRN103 alcheringa narrina Dimensions at widest points approximatelyGRN103 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 170 mm x 70 mm x 80 mm thick Weighs 763 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.