Polished Green Opal rock GRN110 Marra Mamba Dimensions at widest points approximately

Dimensions at widest points approximately 160 mm x 90 mm x 55 mm thick

Dimensions at widest points approximately 130 mm high x 55 mm x 40 mm thick

120 mm x 110 mm x 6 mm thick

HEM144  Hematite geode half

Weight of both is 588 grams

Polished Green Opal rock GRN110 Marra Mamba Dimensions at widest points approximatelyGRN110 Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 85 mm x 50 mm x 45 mm thick Weighs 279 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.