Stromatolitic Dolomite SD159 prehnite From the Pilbara region of

From the Pilbara region of Western Australia

CLA230   A slab

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

From north of Newman in the Pilbara region of Western Australia

PU120  Purple Chalcedony rough rock

Stromatolitic Dolomite SD159 prehnite From the Pilbara region ofSD159 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