Polished Green Opal slab GRN117 chrysoprase Weighs 212 grams

Weighs 212 grams

Dimensions at widest points approximately 120 mm x 60 mm x 11 mm thick

CLA260   Australian Crazy Lace Agate slab

Dendrites in this one

Dimensions at widest points approximately 55 mm  x 50 mm wide x 5 mm thick

Polished Green Opal slab GRN117 chrysoprase Weighs 212 gramsGRN117 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..