Stromatolitic Dolomite SD157 dendrite Dimensions at widest points are

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

with both halves polished on one side

Weighs 142 grams

BA108  Polished Brazilian Agate slab

Not formally identified but possibly Paniscollenia

Stromatolitic Dolomite SD157 dendrite Dimensions at widest points areSD157 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