Polished Marble Bar Chert slab MB114 Opalite Dimensions at widest points approximately

Dimensions at widest points approximately 110 mm x 100 mm x 15 mm thick

Weighs 449 grams

Weighs 689 grams

Tumble polished Prase

WAT105  Tumble polished Wyloo Agate

Polished Marble Bar Chert slab MB114 Opalite Dimensions at widest points approximatelyMB114 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 140 mm x 90 mm x 9 mm thick. Weighs 188 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