Polished Green Opal slab GRN93. aquamarine Dimensions at widest points are

Dimensions at widest points are approximately 140 mm x 45 mm x 40 mm

Weighs 315 grams

OJ164  A rough rock

Dimensions approximately 110 mm x 70 mm x 50 mm thick

a small abandoned gold mining centre in the Midwest region of Western Australia

Polished Green Opal slab GRN93. aquamarine Dimensions at widest points areGRN93 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 115 mm x 90 mm x 9 mm thick Weighs 155 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..