Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal Dimensions at widest points approximately

Dimensions at widest points approximately 185 mm x 90 mm x 60 mm thick

OJ180  A slab

Dimensions at widest points approximately 45 mm x 35 mm x 23 mm thick

A matching pair of polished Magnesite (Lemon Chrysoprase) halves with natural rough backs

Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal Dimensions at widest points approximatelyASP152. 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. 160 mm x 140 mm x 7 mm thick. It weighs 301 grams.