Polished Green Opal rock GRN111 picture jasper Dimensions approximately 130 mm x

Dimensions approximately 130 mm x 95 mm x 95 mm thick

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PU130  Purple Chalcedony slab

Dimensions at widest points approximately 160 mm x 80 mm x 65 mm thick

Dimensions at widest points approximately 60 mm x 55 mm x 22 mm thick

Polished Green Opal rock GRN111 picture jasper Dimensions approximately 130 mm xGRN111 Green Opal rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 145 mm x 60 mm x 55 mm thick Weighs 652 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.