Polished Green Opal rock GRN102 mookaite Dimensions approximately 380 mm x

Dimensions approximately 380 mm x 230 mm x 21 mm thick

Dimensions at widest points are approximately 65 mm x 45 mm x 35 mm

Weighs 1228 grams

Dimensions at widest point approximately 80 mm x 70 mm x 8

Polished Green Opal rock GRN102 mookaite Dimensions approximately 380 mm xGRN102 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 50 mm x 40 mm thick Weighs 340 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.