Polished Marble Bar Chert slab MB133 black conglomerate Dimensions at widest points approximately

Dimensions at widest points approximately 225 mm x 90 mm x 11 mm thick

290 mm x 180 mm x 12 mm thick

Dimensions at widest points approximately 140 mm x 90 mm x 65 mm thick

Weighs  721 grams

Mookaite cut and polished on one side with a rough natural back

Polished Marble Bar Chert slab MB133 black conglomerate Dimensions at widest points approximatelyMB133 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 135 mm x 75 mm x 9. 5 mm thick. Weighs 211 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 rocks. From near the town of