Polished Green Opal slab GRN118 Chrome chalcedony MK469 Mookaite cut and polished

MK469   Mookaite cut and polished on one side with a rough natural back

IRR 124    Fossil stromatolite slab

Dimensions approximately 115 mm x 55 mm x 30 mm deep

Unusual dendritic piece with rare yellow tones

135 mm high x 80 mm wide x 60 mm

Polished Green Opal slab GRN118 Chrome chalcedony MK469 Mookaite cut and polishedGRN118 Green Opal slab, cut and polished on one side . Dimensions at widest points approximately 140 mm x 110 mm x 11 mm thick Weighs 287 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..