Stromatolitic Dolomite SD157 dendrite Dimensions approximately 180mm x 130mm

Dimensions approximately 180mm x 130mm x approx  9mm thick

DO153 Dendritic Opal rough rock

Dimensions at widest points are approximately 180 mm x 80 mm x 50 mm

Weighs 142 grams

Dimensions: approximately 115 mm high x 75 mm x  45 mm thick

Stromatolitic Dolomite SD157 dendrite Dimensions approximately 180mm x 130mmSD157 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 130mm x 100mm x 7mm thick