Polished Marble Bar Chert MB119 chalcedony 180 mm x 65 mm

180 mm x 65 mm  x 7

180 mm x 150 mm x 8

Dimensions at widest points approximately 225 mm high x 110 mm  x 110 mm thick

180 mm x 160 mm x 9

Polished Marble Bar Chert MB119 chalcedony 180 mm x 65 mmMB119 Marble Bar Chert. Cut and polished on one side with a rough, natural back and a cut base to stand as a display specimen ! Dimensions at widest points approximately 220 mm x 145 mm x 70 mm thick. Weighs 3,919 grams. Marble Bar chert is a finely banded, iron rich silica rock from the Marble Bar Chert Member (Warrawoona Group) of Western Australia. Formed in shallow Archean seas, it dates to the Paleoarchean (~3. 46 billion years old), making it