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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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G
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Geode
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INFOTEXT
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1992-09-03
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211b
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In geology, a subspherical cavity into which
crystals have grown, from the outer wall into
the centre. Geodes often contain very
well-formed crystals of quartz (including
amethyst), calcite, or other minerals .