Polished Marble Bar Chert MB109 rare Dimensions approximately 100 mm x

Dimensions approximately 100 mm x 40 mm x 8 mm thick

Very unusual piece

Dimensions approximately 215 mm x 110 mm x 7 mm thick

Dimensions at widest points approximately 75 mm x 35 mm x 25 mm thick

Dimensions at widest points approximately 130 mm x 130 mm x 13

Polished Marble Bar Chert MB109 rare Dimensions approximately 100 mm xMB109 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 140 mm x 60 mm x 45 mm thick. Weighs 718 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