Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green 160 mm x 80 mm

160 mm x 80 mm x 50 mm thick

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

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

Dimensions at widest points approximately 250 mm high x 115 mm wide x 60 mm thick

Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green 160 mm x 80 mmASP153. 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.