Stromatolitic Dolomite SD159 prehnite It weighs 546 grams

It weighs 546 grams

180 mm x 100 mm x 35 mm thick

All reasonably uniform in size (roughly 20 - 25 mm diameter)

Weighs 265grams

From north of Newman in the Pilbara region of Western Australia

Stromatolitic Dolomite SD159 prehnite It weighs 546 gramsSD159 Stromatolitic Dolomite slab, polished on one side. Sections consist of a chaotic mixture of dolomite and or stromatolite fragments set in a matrix of mudstone and or coarsely crystalline dolomite . The pink and red colouration can be attributed to the presence of finely disseminated iron oxides . It often contain layers and nodules of red chert. From the Irregully Formation, Western Australia. Dimensions approximately 165mm x 105mm x 8mm thick