Polished Marble Bar Chert MB107 oldest agate in the world They usually occur as weathered

They usually occur as weathered out nodules formed by branched

Age is Palaeoproterozoic (1

MK537   Mookaite

SU182  Sunset Jasper slab

MN133  Magneprase slab

Polished Marble Bar Chert MB107 oldest agate in the world They usually occur as weatheredMB107 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