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

Desert Sunset is a banded iron formation that is comprised of alternating layers of red and yellow jasper and chert with narrow bands of black hematite

MK537   Mookaite

CH433  Chrysoprase nodule

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