Polished fossil stromatolite slab. Asperia ashburtonia. ASP159 chalcedony Dimensions at widest points approximately

Dimensions at widest points approximately 175 mm x 95 mm x 9 mm thick

70 mm x 50 mm  x 30 mm

Dimensions at widest points approximately 110 mm x 90 mm x 45 mm thick

DO190  Dendritic Opal slab polished on one side

From the Ashburton region in Western Australia

Polished fossil stromatolite slab. Asperia ashburtonia. ASP159 chalcedony Dimensions at widest points approximatelyASP159. 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. 180 mm x 150 mm x 6. 5 mm thick. It weighs 369 grams.