Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal A matching pair of polished

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

Dimensions at widest points approximately 70 mm x 40 mm x 13 mm thick

Mookaite rough rock

Dimensions at widest point approximately 110 mm x 70 mm x 9 mm

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

Polished fossil stromatolite slab. Asperia ashburtonia. ASP152 Wanong Dendritic Opal A matching pair of polishedASP152. 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.