Polished fossil stromatolite. Strelley Pool Formation SPF129 polished prehnite Desert Sunset is a banded

Desert Sunset is a banded iron formation that is comprised of alternating layers of red and yellow jasper and chert with narrow bands of black hematite

Dimensions at widest points approximately 105 mm x 90 mm x 70 mm deep

From near Norseman

Porphyry is a general term that is used rather loosely for  igneous rocks which contain relatively large isolated crystals set in a fine-grained groundmass

Weight is 1

Polished fossil stromatolite. Strelley Pool Formation SPF129 polished prehnite Desert Sunset is a bandedSPF129 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.