Stromatolitic Dolomite SD155 Tumbled stones The pink and red colouration

The pink and red colouration can be attributed to the presence of finely disseminated iron oxides

280 mm x 130 mm x 10

110 mm x 110 mm x 8 mm

Weighs 540 grams

Dimensions approximately 170mm x 45mm x 15-45mm thick

Stromatolitic Dolomite SD155 Tumbled stones The pink and red colourationSD155 Stromatolitic Dolomite rough rock, cut and 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 40mm