Polished fossil stromatolite. Strelley Pool Formation SPF129 dolomite They usually occur as weathered

They usually occur as weathered out nodules formed by branched

SPF131   Fossil stromatolite

Prehnite slab

cut and polished on one side with a natural back

It weighs 168 grams

Polished fossil stromatolite. Strelley Pool Formation SPF129 dolomite They usually occur as weatheredSPF129 Fossil stromatolite . Rough rock with natural back, cut and polished on one side. Excellent display 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 at widest points approx. 270 mm x 100 mm x 70 mm thick. Weighs 1,956 grams.