Polished Marble Bar Chert MB120 asperia ashburtonia 200 mm x 80 mm

200 mm x 80 mm  x 60 mm

115 mm x 95 mm x 8

Weighs 425 grams

Dimensions approximately 120 mm x 30 mm x 10 mm thick

Polished Marble Bar Chert MB120 asperia ashburtonia 200 mm x 80 mmMB120 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