Polished Marble Bar Chert MB107 oldest agate in the world MN133 Magneprase slab

MN133  Magneprase slab

MK537   Mookaite

Dimensions at widest points approximately 180 mm x 150 mm x 55 mm thick

Weighs 500 grams

Polished Marble Bar Chert MB107 oldest agate in the world MN133 Magneprase slabMB107 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 105 mm x 60 mm x 50 mm thick. Weighs 520 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