Polished fossil stromatolite slab. Asperia ashburtonia. ASP162 purple chalcedony Dimensions at widest points approximately

Dimensions at widest points approximately 135 mm x 60 mm x 8

80 mm x 60 mm  x 7

Dimensions at widest points approximately 110 mm x 100 mm x 55 mm thick

130 mm x 95 mm x 30 mm

Approximate dimensions at widest points 120 mm  x 75 mm  x 12

Polished fossil stromatolite slab. Asperia ashburtonia. ASP162 purple chalcedony Dimensions at widest points approximatelyASP162 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. 110 mm x 70 mm x 12 mm thick. It weighs 226 grams.