Polished Green Opal slab GRN118 Chrome chalcedony Unusual dendritic piece with rare

Unusual dendritic piece with rare yellow tones

135 mm high x 80 mm wide x 60 mm

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

Dimensions approximately 115 mm x 55 mm x 30 mm deep

Polished Green Opal slab GRN118 Chrome chalcedony Unusual dendritic piece with rareGRN118 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..