Polished Green Opal slab GRN113 stitchtite in serpentine Dimensions approximately 120 mm x

Dimensions approximately 120 mm x 65 mm x 8 mm thick

NJ453   Noreena Jasper slab

180 mm x 100 mm x 35 mm thick

Dimensions at widest points approximately 150 mm x 105 mm x 10

190 mm x 190 mm x 70 mm

Polished Green Opal slab GRN113 stitchtite in serpentine Dimensions approximately 120 mm xGRN113 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 150 mm x 100 mm x 11 mm thick Weighs 318 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..