Polished Marble Bar Chert slab MB123 magneprase Tapering in thickness from 5mm

Tapering in thickness from 5mm - 20mm

Weighs 78 grams

Weighs:  3

Dimensions at widest points approximately 130 mm  x 120 mm wide x 11 mm thick

Weighs:  58 grams

Polished Marble Bar Chert slab MB123 magneprase Tapering in thickness from 5mmMB123 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 140 mm x 100 mm x 8. 5 mm thick. Weighs 279 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