Polished Green Opal rock GRN101 beryl Dimensions approximately 130 mm x

Dimensions approximately 130 mm x 95 mm x 95 mm thick

Queensland

Dimensions at widest points approximately 120 mm x 60  mm x 8 mm thick

Dimensions approximately 135 mm x 90 mm x 9

Dimensions at widest points approximately 150 mm x 85 mm x 70 mm thick

Polished Green Opal rock GRN101 beryl Dimensions approximately 130 mm xGRN101 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.