Polished Green Opal slab GRN112 Wanong Dendritic Opal 270 mm x 110 mm

270 mm x 110 mm x 60 mm thick

Dimensions approximately 180 mm x 65 mm x 6 mm thick

Dimensions at widest points approximately 100 mm x 50 mm x 15 mm thick

Weight 584 grams

MK512   Mookaite

Polished Green Opal slab GRN112 Wanong Dendritic Opal 270 mm x 110 mmGRN112 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 90 mm x 10 mm thick Weighs 171 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..