Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal Dimensions at widest points approximately

Dimensions at widest points approximately 185 mm x 90 mm x 60 mm thick

Dimensions at widest points approximately 70 mm x 40 mm x 13 mm thick

Dimensions at widest point approximately 110 mm x 70 mm x 9 mm

Dimensions approximately 100 mm x 50 mm x 40 mm deep

Dimensions at widest points approximately 150 mm  x 100 mm x 6

Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal Dimensions at widest points approximatelyASP152. 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. 160 mm x 140 mm x 7 mm thick. It weighs 301 grams.