Polished fossil stromatolite slab. Asperia ashburtonia. ASP161 quartz From near Newman in the

From near Newman in the Pilbara region of Western Australia

Dimensions at widest points approximately 50 mm x 50 mm x 25 mm thick

Dimensions at widest points approximately 290 mm  x 200 mm x 9 mm thick

Dimensions at widest points approximately 200 mm x 75 mm x 17 mm thick

GRN99  Green Opal & Magnesite slab

Polished fossil stromatolite slab. Asperia ashburtonia. ASP161 quartz From near Newman in theASP161 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. 225 mm x 200 mm x 10 mm thick. It weighs 931 grams.