Polished Marble Bar Chert MB120 rock block The pink and red colouration

The pink and red colouration can be attributed to the presence of finely disseminated iron oxides

Weighs 516 grams

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

It weighs 483 grams

EPI74   Epidote

Polished Marble Bar Chert MB120 rock block The pink and red colourationMB120 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