Polished Green Opal slab GRN117 Irregully formation Dimensions approximately 100 mm x

Dimensions approximately 100 mm x 50 mm x 7

Weight 183 grams

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

Lilac Mookaite cut and polished on one side with a rough natural back

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

Polished Green Opal slab GRN117 Irregully formation Dimensions approximately 100 mm xGRN117 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..