Polished Green Opal rock GRN89 outback jasper 70 mm x 40 mm

70 mm x 40 mm  x 35 mm

160 mm x 160 mm  x 17 mm

Mookaite slab

Dimensions at widest point approximately 120 mm x 60 mm x 35 mm

A polished slab of Starry Jasper

Polished Green Opal rock GRN89 outback jasper 70 mm x 40 mmGRN89 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 210 mm x 60 mm x 65 mm thick Weighs 1,406 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.