Polished Green Opal rock GRN101 ashburton agate Weighs 602 grams

Weighs 602 grams

IRR 134    Fossil stromatolite rough rock

From Mooka Creek near the Kennedy Ranges

Each piece approximately 6 - 8 cm at widest points

It weighs 237 grams

Polished Green Opal rock GRN101 ashburton agate Weighs 602 gramsGRN101 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 90 mm x 55 mm x 30 mm thick Weighs 205 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.