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Huge museum quality display piece
Weighs 129 grams
cut and polished on one side with a rough naturally weathered back
Dimensions at widest point approximately 110 mm x 60 mm x 60 mm
Polished Green Opal rock GRN102 magneprase Huge museum quality display pieceGRN102 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 90 mm x 50 mm x 40 mm thick Weighs 340 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.
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