Polished Green Opal rock GRN102 mookaite RH257 A slab

RH257  A slab

Dimensions at widest points are approximately 65 mm x 45 mm x 35 mm

Variscite rough rock

Dimensions at widest points approximately 175 mm x 65 mm and 45 mm thick

Polished Green Opal rock GRN102 mookaite RH257 A slabGRN102 Green Opal & Magnesite rough rock, cut and polished on one side with a rough, naturally weathered back Dimensions at widest points approximately 90 mm x 50 mm x 40 mm thick Weighs 340 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.