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goethite and quartz and it displays a beautiful golden iridescence
Exceptionally large slab for this material
Weighs: 102 grams
OG189 A matching pair of polished Orbicular Granite halves with natural rough backs
It weighs 406 grams
Polished Marble Bar Chert slab MB108 peanut wood goethite and quartz and itMB108 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 130 mm x 65 mm x 16 mm thick. Weighs 265 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 rocks. From near the town of
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