Polished Green Opal rock GREEN76 stripey jasper 15 - 20 mm across

15 - 20 mm across

Dimensions at widest points approximately 115 mm x 100  mm x 18 mm thick

100 mm x 70 mm x 50 mm thick

From near the Kennedy Ranges

75 mm x 60 mm x 8 mm thick

Polished Green Opal rock GREEN76 stripey jasper 15 - 20 mm acrossGREEN76 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 130 mm x 130 mm x 50 mm thick Weighs 1,238 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.