Polished fossil stromatolite slab. Asperia ashburtonia. ASP159 chalcedony From the Ashburton region in

From the Ashburton region in Western Australia

70 mm x 50 mm  x 30 mm

Dimensions at widest points approximately 120 mm x 45 mm x 45 mm thick

PC126  Chalcedony rough rock

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

Polished fossil stromatolite slab. Asperia ashburtonia. ASP159 chalcedony From the Ashburton region inASP159. 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.