Polished Marble Bar Chert MB110 Polished slab. Dimensions at widest point approximately

Dimensions at widest point approximately 95 mm x 90 mm x 9 mm

These rare stromatolites are from the “Windidda Formation”

150 mm x 100 mm x 7

Dimensions at widest points approximately 120 mm x 65 mm x 8 mm thick

Weighs 97 grams

Polished Marble Bar Chert MB110 Polished slab. Dimensions at widest point 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