Polished fossil stromatolite slab. Domal from Irregully formation IRR123 asperia ashburtonia Very rare fossil stromatolite slab

Very rare fossil stromatolite slab

Extremely rare mineral specimen or suitable for cutting into high end cabochons

130 mm x 100 mm x 45 mm thick

Totally replaced by colourful chert

Rare mini marshmallows in this one :)

Polished fossil stromatolite slab. Domal from Irregully formation IRR123 asperia ashburtonia Very rare fossil stromatolite slabIRR 123 Fossil stromatolite slab, polished on one side. Huge museum quality display piece ! A domal stromatolite from the Proterozoic "Irregully Formation", age approx. 1. 1 billion years. Not formally identified but possibly Paniscollenia. Dimensions at widest points approximately 600 mm x 390 mm x 20 mm thick. It weighs 10. 5 kg.