Polished Green Opal rock GRN96 Rhodo Dimensions at widest points approximately

Dimensions at widest points approximately 160 mm x 90 mm x 70 mm thick

195 mm x 100 mm x 48 mm

From near Kalgoorlie

The quartz epidote axinite mineralisation was evidently caused by hydrothermal activity related to the doleritic sills which are in close proximity to the occurrence

Polished Green Opal rock GRN96 Rhodo Dimensions at widest points approximatelyGRN96 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 120 mm x 55 mm x 35 mm thick Weighs 322 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.