Polished Marble Bar Chert slab MB133 black conglomerate 290 mm x 180 mm

290 mm x 180 mm x 12 mm thick

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

TI418  Tiger Iron slab

Big display specimen featuring the wood in matrix

130 mm x 70 mm  x 8 mm

Polished Marble Bar Chert slab MB133 black conglomerate 290 mm x 180 mmMB133 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