Polished Green Opal slab GRN88 rare It occurs as a single

It occurs as a single vein

Weighs 362 grams

100 mm x 75 mm x 13 mm thick & weighs 233 grams

Dimensions at widest points approximately 90 mm x 80 mm x 70 mm deep

Dimensions at widest points approximately 110 mm x 55 mm x 40 mm thick

Polished Green Opal slab GRN88 rare It occurs as a singleGRN88 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 190 mm x 55 mm x 14 mm thick Weighs 1228 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.