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.
