Polished Green Opal slab GRN113 stripey Weighs 439 grams

Weighs 439 grams

Weighs:  169 grams

Weighs 744 grams

Dimensions at widest points approximately 120 mm x 105 mm x 80 mm thick

Dimensions at widest points approximately 130 mm  x 65 mm x 9 mm thick

Polished Green Opal slab GRN113 stripey Weighs 439 gramsGRN113 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 150 mm x 100 mm x 11 mm thick Weighs 318 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..