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How to tell if a geode is hollow?

How to tell if a geode is hollow?

https://www.youtube.com/embed/w1Qq7B5JQxA How to Tell If A Geode Is Hollow? In this video, I learn a lot about the density of rocks! Like a lot of people, I adored science at a kid but lost interest over time. This really brought me back to the little science...

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