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MN129 Magneprase slab
OG190 A matching pair of polished Orbicular Granite halves with natural rough backs
Studies have shown that these are probably the oldest agates in the world with an age in excess of 2 billion years
CH456 Chrysoprase slab
CC147 Chrome chalcedony slab
Polished Marble Bar Chert MB127 chrysophase MN129 Magneprase slabMB127 Marble Bar Chert. Cut and polished on one side with a rough, natural back. Dimensions at widest points approximately 190 mm x 110 mm x 80 mm thick. Weighs 2,111 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
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