Polished Green Opal rock GRN101 ashburton agate Dimensions at widest points approximately

Dimensions at widest points approximately 180 mm x 170 mm x 50 mm thick

From near Newman

Each piece approximately 6 - 8 cm at widest points

MK407   Lilac Mookaite cut and polished on one side with a rough natural back

Polished Green Opal rock GRN101 ashburton agate Dimensions at widest points approximatelyGRN101 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.