Polished Green Opal rock GRN115 polished magneprase Weighs 132 grams

Weighs 132 grams

Chert Breccia polished slab

Dimensions at widest points approximately 290 mm  x 170 mm x 9 mm thick

Dimensions at widest points approximately 195 mm x 145 mm x 13 mm thick

Each piece approximately 5 - 7 cm at widest points

Polished Green Opal rock GRN115 polished magneprase Weighs 132 gramsGRN115 Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 125 mm x 100 mm x 50 mm thick Weighs 686 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.