Polished Green Opal slab GRN109

GRN109  Green Opal  slab, cut and polished on one side .

Dimensions at widest points approximately 95 mm x 70 mm x 11 mm thick

Weighs 144 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.