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geode

geode

5 9.2
A rock with a hollow inside lined with crystals
  • noun
  • /ˈdʒiːoʊd/
: geoda
  • The museum had an impressive display of geodes, showcasing the unique formations found in nature.
  • find geodes
  • geodes are hollow
  • Geodes are hard

And the rocks, the formation, you know how minerals form a lot of times into geodes and all different things.

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Examples

  • "It reminds me of some geodes my ex-husband brought back from a diving trip to Canada.

    Fiction book (1998)
  • It was an agate, a fabulous geode from the sky, composed of concentric layers of milky ice.

    Fiction book (1991)
  • Some geodes lying at the very bottom were what Mike said he found.

    Fiction book (1998)
  • A box of geodes caught my son's attention.

    Blog text (1)
  • Lim toyed with a geode key ring.

    Fiction book (2000)
  • As Jan hurried down the hall with Peter, he asked, "What was inside those geodes?"

    Fiction book (1998)
  • A geode is a rock that contains a cavity lined with beautiful crystals.

  • They discovered a large geode while digging in the hillside, revealing stunning quartz crystals inside.

Surface Forms

geode singular
geodes plural

Etymology

Geode comes from the Greek root geo- meaning 'earth', the same root you see in geography and geology. So a geode is like a small 'earth' rock: plain on the outside but with a hidden hollow inside full of crystals.