Polished Green Opal rock GRN111

GRN111  Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back

Dimensions at widest points approximately 145 mm x 60 mm x 55 mm thick

Weighs 652 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.