Polished Marble Bar Chert MB110 chalcedony Dimensions at widest points approximately

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

CH485  Chrysoprase rough rock

85 mm x 65 mm x 50 mm thick

Dimensions at widest points approximately 175 mm x 115 mm x 30 mm thick

Dimensions approximately 170 mm x 65 mm x 9 mm thick

Polished Marble Bar Chert MB110 chalcedony Dimensions at widest points approximatelyMB110 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