Geode with quartz crystals
(DSM #SD8) Geodes are crystals that form to fill a void. The outer portion of the stone is usually non-descript and plain but the crystals show themselves when the rock is hit with a hammer.
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“Pseudofossil - Geode,” Mississippi State University Libraries, accessed August 11, 2022, https://msstate-exhibits.libraryhost.com/items/show/1663.
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