Repost-From National Geographic: The Giant Crystal Caves Of Naica

In a Mexican zinc mine, gypsum crystals over 30 feet long have been found.  They need temperatures over 120F and submersion in water to grow, so it’s a rare find.  One would deduce that such conditions existed for a long time in this particular cave.

The Giant Crystal Project Site here.

More on gypsum here (a key ingredient in plaster and drywall as well as chalk, so it’s likely all around you), a brief youtube video here of its molecular structure.

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One thought on “Repost-From National Geographic: The Giant Crystal Caves Of Naica

  1. Crystal Caves man, howdotheywork?… National Geographic channel will be showing the crystal caves at 8PM. I saw the first cave last year, this should be amazing!.

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