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| LuAnn Dahlman, TERC |
| Geode |
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| Bryan Aivazian, TERC |
| Granite Countertop |
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| LuAnn Dahlman, TERC |
| Salt |
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| NPS Photo |
| Carlsbad Caverns |
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Consider these items and other things you know of that are made of crystals. Where else have you seen crystals? Think of as many different types of crystals as you can.
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