Polished Green Opal slab GRN86 Kumarina Agate IRR 123 Fossil stromatolite slab

IRR 123    Fossil stromatolite slab

Conglomerates are a very common rock type that occur in numerous locations world wide

Weight is 93 grams

80 mm x 70 mm x 30 mm thick

Dimensions at widest points approximately 125 mm  x 50 mm wide x 6 mm thick

Polished Green Opal slab GRN86 Kumarina Agate IRR 123 Fossil stromatolite slabGRN86 Green Opal & Magnesite slab, cut and polished on one side . Dimensions at widest points approximately 110 mm x 60 mm x 11 mm thick Weighs 107 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.