Polished Green Opal rock GRN96 rare agate Dimensions approximately 200 mm x

Dimensions approximately 200 mm x 120 mm x 100 mm thick

Green Opal occurs at a location south of Kalgoorlie in the Eastern Goldfields of Western Australia

110 mm x 40 mm x 7 mm thick

Dimensions at widest points approximately 80 mm x 65 mm x 12 mm thick

Weighs 439 grams

Polished Green Opal rock GRN96 rare agate Dimensions approximately 200 mm xGRN96 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 120 mm x 55 mm x 35 mm thick Weighs 322 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.