Polished Marble Bar Chert slab MB123 atlantisite HEM141 Hematite geode half

HEM141  Hematite geode half

220 mm x 125 mm x 9 mm thick

Perfect point

Dimensions at widest points approximately 90 mm x 90 mm x 40 mm thick

Weight is 381 grams

Polished Marble Bar Chert slab MB123 atlantisite HEM141 Hematite geode halfMB123 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