Polished fossil stromatolite. Strelley Pool Formation SPF135 alcheringa narrina BJ138 Polished "Black Jade" A

BJ138 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

The location it comes from is near Nullagine in the Pilbara region of Western Australia

45 mm x 35 mm  x 22 mm

Weighs  850 grams

Dimensions at widest points approximately 150 mm x 55 mm  x 9 mm thick

Polished fossil stromatolite. Strelley Pool Formation SPF135 alcheringa narrina BJ138 Polished "Black Jade" ASPF135 Fossil stromatolite . Rough rock with natural back, cut and polished on one side. 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 at widest points approx. 120 mm x 100 mm x 45 mm thick. Weighs 635 grams.