Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green Dimensions at widest points approximately

Dimensions at widest points approximately 190 mm x 150 mm x 30 - 65 mm thick

RH274  A slab

160 mm x 80 mm x 50 mm thick

Very unusual piece of Chrysoprase grading to a central core of whitish Chalcedony

Dimensions at widest points approximately 95 mm x 60 mm x 8 mm thick

Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green Dimensions at widest points approximatelyASP153. Fossil stromatolite slab, polished on one side. Asperia ashburtonia from the Proterozoic "Duck Creek Dolomite". Age is approx. 2 billion years. From near Paraburdoo in Western Australia. Dimensions at widest points approx. 170 mm x 145 mm x 9 mm thick. It weighs 443 grams.