When we think of the ocean and what's in it, you probably think of stuff like fish, or salt, or seaweed. But there's a crystal that is so vital to marine life that they take dissolved materials in that salty water and build it themselves. This month's Rocks Box video, we're talking aragonite!

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Sources:
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Images:
https://www.gettyimages.com/
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https://commons.wikimedia.org/wiki/Fi...
https://commons.wikimedia.org/wiki/Fi...