Polished Green Opal rock GRN89 toredo POP165 Pink Opal rough rock

POP165   Pink Opal rough rock

From near Tamworth

Dimensions at widest points approximately 95 mm x 70 mm x 60 mm thick

Age is Palaeoproterozoic (1

Polished Green Opal rock GRN89 toredo POP165 Pink Opal rough rockGRN89 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 210 mm x 60 mm x 65 mm thick Weighs 1,406 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.