ALC139.
Fossil stromatolite rough rock, cut and polished on one side .
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. 120mm x 95mm x 50mm thick.This piece has a smattering of pyrite inclusions through it. Rare.
Weighs 790grams.
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