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

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

Dimensions at widest points approximately 110 mm

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

Dimensions at widest points are approximately 150 mm x 70 mm x 10 mm

Magnesite (Lemon chrysoprase) thick slab polished on one side

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.