Polished Marble Bar Chert slab MB111 crazy lace AMU111 Amethyst geode portion from
Description
AMU111 Amethyst geode portion from Artigas
5 mm thick
Weighs 233 grams
CH437 Chrysoprase slab polished on one side
Polished Marble Bar Chert slab MB111 crazy lace AMU111 Amethyst geode portion fromMB111 Marble Bar Chert slab polished on one side . Dimensions at widest points approximately 135 mm x 120 mm x 9. 5 mm thick. Weighs 369 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
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