Polished Green Opal slab GRN117 Irregully formation Dimensions at widest points approximately

Dimensions at widest points approximately 220 mm x 145 mm x 70 mm thick

Weight is 768 grams

Dimensions at widest points approximately 70 mm x 35 mm x 30 mm thick

270 mm x 250 mm x 13 mm thick

170 mm x 70 mm x 60 mm thick & weighs 763 grams

Polished Green Opal slab GRN117 Irregully formation Dimensions at widest points approximatelyGRN117 Green Opal slab, cut and polished on one side . Dimensions at widest points approximately 195 mm x 65 mm x 14 mm thick Weighs 339 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..