Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green Very unusual piece of Chrysoprase

Very unusual piece of Chrysoprase grading to a central core of whitish Chalcedony

Dimensions at widest points approximately 95 mm x 60 mm x 8 mm thick

Dimensions at widest points approximately 250 mm high x 115 mm wide x 60 mm thick

Dimensions at widest points approximately 175 mm x 115 mm x 30 mm thick

RH274  A slab

Polished fossil stromatolite slab. Asperia ashburtonia. ASP153 green Very unusual piece of ChrysopraseASP153. 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. 170 mm x 145 mm x 9 mm thick. It weighs 443 grams.