Polished fossil stromatolite slab. Strelley Pool Formation SPF145 #gemstone Dimensions at widest points approximately

Dimensions at widest points approximately 180 mm  x 110 mm x 9 mm thick

5 billion years)

390 mm x 120 mm  x 22 mm

90 mm x 70 mm x 32 mm thick

BJ120 Polished "Black Jade" A trade name for metamorphosed magnesian tholeiite (basalt)

Polished fossil stromatolite slab. Strelley Pool Formation SPF145 #gemstone Dimensions at widest points approximatelySPF145. Fossil stromatolite slab, 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 approx. 250 mm x 140 mm x 12. 5 mm thick. Weighs 693 grams.