SPF116. Fossil stromatolite slab, polished on one side.
Late stage quartz vein intrudes this piece.
These are the oldest known fossils on Earth.
From the Strelley Pool Formation in the Pilbara region of Western Australia.
Age is approx. 3.4 billion years.
Dimensions approx. 280 mm x 110 mm x 12 mm thick.
Weighs 676 grams.