Polished Marble Bar Chert MB110 chrysophase The white areas are small

The white areas are small feldspar crystals

Dimensions approximately 150 mm x 110 mm x 7 mm thick

Dimensions at widest points approximately 110 mm x 65 mm x 30 mm thick

170 mm x 60 mm x 45 mm

MC117 Marillana Conglomerate rough rock

Polished Marble Bar Chert MB110 chrysophase The white areas are smallMB110 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