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geodes

Where Do Geodes Come From?
Image: iStockphoto.com/JodiJacobson

Where Do Geodes Come From?

As solid as a rock…or not. A cavity can form in a rock, and then it’s just waiting to be filled. When mineral-rich water seeps in it fills the space with unusual results.

Crack open such a rock to find its treasure inside — and discover the science behind its sparkle.

Scienceline

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