Fossil stromatolite polished on one side with natural weathered exterior.
Numerous small cubic pyrite crystals scattered through this very rare specimen.
Alcheringa narrina from the Archaean Meentheena Member within the Tumbiana Formation.
Age is approx. 2.7 billion years.
From near Nullagine in Western Australia.
Approx. 170 mm x 90 mm x 70 mm thick.