Polished Green Opal rock GREEN76 stripey jasper 75 mm x 60 mm

75 mm x 60 mm x 8 mm thick

100 mm x 70 mm x 50 mm thick

Very rare fossil stromatolite slab polished on one side

Weighs 926 grams

From near the Kennedy Ranges

Polished Green Opal rock GREEN76 stripey jasper 75 mm x 60 mmGREEN76 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.