Polished Green Opal rock GRN101 pilbara agate 125 mm x 95 mm

125 mm x 95 mm x 30 mm

Dimensions at widest points approximately 120 mm x 70 mm x 45 mm thick

Weighs:  208 grams

140 mm x 90 mm x 40 mm thick

Weighs  752 grams

Polished Green Opal rock GRN101 pilbara agate 125 mm x 95 mmGRN101 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.