Polished Green Opal slab GRN116 Polished dendritic opal 80 mm x 80 mm

80 mm x 80 mm  x 15 mm

Displaying pollucite

Dimensions at widest points approximately 185 mm x 50 mm x 10 mm thick

CH475  Chrysoprase slab

Dimensions at widest points approximately 70 mm x 70 mm x 25 mm thick

Polished Green Opal slab GRN116 Polished dendritic opal 80 mm x 80 mmGRN116 Green Opal slab, cut and polished on one side . Dimensions at widest points approximately 125 mm x 65 mm x 12 mm thick Weighs 135 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..