geode in A Sentence

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    The world's largest Geode, formed when the Mediterranean disappeared, reveals a new study.

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    The team's driving question: Where did the calcium sulfate in the Pulpí Geode come from?

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    The guiding question of the project is where the Pulpí Geode calcium sulfate came from?

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    While you may have never stood inside a Geode, you have probably held, or at least seen, one before.

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    The term"geodi", typically European, inconvenient for comparison with mineralogy, where the Geode is a small hollow rock bounded by crystals.

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    At Pulpí, however, the mine was completely dry, and the Geode's crystals had not grown in tens of thousands of years.

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    On top of that, the Geode's gypsum spikes are incredibly pure- so translucent that"you can see your hand through them," García-Ruiz said.

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    The crystal columns at Pulpí are made of gypsum- the product of water, calcium sulfate, and lots and lots of time- but not much else has been revealed about them since the Geode's unexpected discovery in 2000.

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