Polished Green Opal slab GRN112 lemon chrysoprase Slightly tapering thickness of 6

Slightly tapering thickness of 6 - 9 mm

Dimensions at widest points approximately 140 mm  x 105 mm x 7 mm thick

Dimensions at widest points approximately 170 mm x 110 mm and 9 mm thick

Dimensions at widest points approximately 195 mm x 90 mm x 9

brown iron oxides and druzy quartz pockets

Polished Green Opal slab GRN112 lemon chrysoprase Slightly tapering thickness of 6GRN112 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 90 mm x 10 mm thick Weighs 171 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..