Polished Green Opal rock GREEN73

GREEN73  Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back

Dimensions at widest points approximately 200 mm x 100 mm x 50 mm thick

Weighs 1,222 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.