Polished Green Opal display specimen GRN94 dendrite 8 billion years

8 billion years

Dimensions at widest points approximately 170 mm x 125 mm x 15 mm thick

100 mm x 75 mm x 25 mm

Box measures 41 cm x 28 cm x 4 cm deep

6 billion years

Polished Green Opal display specimen GRN94 dendrite 8 billion yearsGRN94 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