Polished Green Opal rock GREEN84 dendritic opal Dimensions at widest points approximately

Dimensions at widest points approximately 120 mm x 120 mm x 70 mm thick

Weight is 581 grams

Weight of box and contents 2

Weighs 950 grams

Dimensions at widest points approximately 80 mm x 90 mm x 60 mm thick

Polished Green Opal rock GREEN84 dendritic opal Dimensions at widest points approximatelyGREEN84 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 225 mm x 85 mm x 65 mm thick Weighs 1,315 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.