Polished Green Opal slab GRN87 slab Dundas near Zeehan

Dundas  near Zeehan

Dimensions approximately 90 mm x 80 mm x 75 mm thick

Dimensions at widest point approximately 120 mm x 70 mm x 9 mm

Dimensions at widest points approximately 120 mm x 100 mm x 14 mm thick

cut and polished on one side with a natural crystalline rear

Polished Green Opal slab GRN87 slab Dundas near ZeehanGRN87 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 80 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.