Polished Green Opal display specimen GRN81 brecciated Weighs 540 grams

Weighs 540 grams

Weighs 398 grams

TI220   Tiger Iron slab

Quartz vein intrusion in this piece

CC121  Chrome chalcedony slab

Polished Green Opal display specimen GRN81 brecciated Weighs 540 gramsGRN81 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back and a cut base to stand on. Dimensions at widest points approximately 155 mm x 80 mm x 60 mm thick Weighs 1,216 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