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DO209 Dendritic Opal rough rock
Dimensions at widest points approximately 140 mm x 120 mm x 9
Dimensions at widest points approximately 135 mm x 100 mm x 65 mm thick
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VV101 Vivianite nodule cut in half with both faces polished
Polished Marble Bar Chert MB118 dup-review-publication DO209 Dendritic Opal rough rockMB118 Marble Bar Chert. Cut and polished on one side with a rough, natural back and a cut base to stand as a display specimen ! Dimensions at widest points approximately 140 mm x 120 mm x 60 mm thick. Weighs 2,000 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