Polished Green Opal slab GRN97. dolomite Dimensions approximately 115 mm x

Dimensions approximately 115 mm x 70 mm x 11 mm thick

Weighs:  2

66 mm x 31 mm x 6 mm thick dome

Dimensions at widest point approximately 190 mm x 75 mm x 55 mm

Tumble polished Jelly Bean Jasper or Red Jasper Conglomerate in Hematite rich matrix

Polished Green Opal slab GRN97. dolomite Dimensions approximately 115 mm xGRN97 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 115 mm x 70 mm x 12 mm thick Weighs 128 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..