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

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

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

OJ173  A slab

OJ180  A slab

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

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