Polished Green Opal rock GREEN85 asperia ashburtonia CC146 Chrome chalcedony slab

CC146  Chrome chalcedony slab

IRR 123    Fossil stromatolite slab

Weight 503 grams

Dimensions approximately 95 mm x 70 mm x 8 mm thick

SU138  Sunset Jasper rough rock

Polished Green Opal rock GREEN85 asperia ashburtonia CC146 Chrome chalcedony slabGREEN85 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 170 mm x 70 mm x 50 mm thick Weighs 622 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.