Polished Marble Bar Chert MB120 rock block cut and polished on one

cut and polished on one side with a natural back and a cut base to sit as a display specimen

150 mm x 105 mm x 12 mm thick

Weighs 516 grams

Dimensions at widest points approximately 85 mm x 80 mm x 35 mm thick

Polished Marble Bar Chert MB120 rock block cut and polished on oneMB120 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 130 mm x 60 mm x 50 mm thick. Weighs 490 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