Polished Green Opal display specimen GRN94 rare Dimensions at widest points approximately

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

RH262  A slab

TI206   Tiger Iron rough rock

Dimensions approximately 140 mm x 50 mm x 37 mm thick

Polished Green Opal display specimen GRN94 rare Dimensions at widest points approximatelyGRN94 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