Polished Marble Bar Chert MB110 chalcedony 85 mm x 65 mm

85 mm x 65 mm x 50 mm thick

Dimensions at widest points approximately 165 mm x 105 mm  x 9

Dimensions at widest points approximately 75 mm x 55 mm x 11 mm thick

Weighs 89 grams

Weighs 437 grams

Polished Marble Bar Chert MB110 chalcedony 85 mm x 65 mmMB110 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 110 mm x 55 mm x 45 mm thick. Weighs 339 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 one of the Earths oldest well preserved sedimentary