Polished Green Opal rock GRN115 polished magneprase Dimensions at widest points approximately

Dimensions at widest points approximately 290 mm  x 170 mm x 9 mm thick

PC121 Chalcedony slab

TI353  Tiger Iron slab

Dimensions approximately 90 mm x 80 mm x 7 mm thick

From near Kennedy Ranges

Polished Green Opal rock GRN115 polished magneprase Dimensions at widest points approximatelyGRN115 Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 125 mm x 100 mm x 50 mm thick Weighs 686 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.