Stromatolitic Dolomite SD156 ashburton agate Dimensions 185 mm x 65

Dimensions 185 mm x 65 mm x 14 mm thick

CC119  Chrome chalcedony slab

150mm x 110mm x 8mm thickness

Dundas region

Weighs 140grams

Stromatolitic Dolomite SD156 ashburton agate Dimensions 185 mm x 65SD156 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 170mm x 100mm x 7mm thick