Polished Green Opal display specimen GRN94 rare Dimensions approximately 140 mm x

Dimensions approximately 140 mm x 50 mm x 37 mm thick

These interesting mineral oddities occur in the banks of the Gascoyne River about 130 km east of Carnarvon

Dimensions at widest points approximately 175 mm x 130 mm x  9 mm thick

Dimensions at widest point approximately 135 mm x 90 mm x 9 mm

TI206   Tiger Iron rough rock

Polished Green Opal display specimen GRN94 rare Dimensions approximately 140 mm xGRN94 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back and a cut base to stand on. Dimensions at widest points approximately 180 mm x 90 mm x 65 mm thick Weighs 1,363 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