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They are made out
of sand.

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15y ago

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More answers

Rocks are primarily made up of minerals, which are naturally occurring inorganic substances with a distinct chemical composition and crystal structure. The most common minerals found in rocks are quartz, feldspar, mica, and calcite. Additionally, rocks may also contain organic materials, such as fossils or coal.

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AnswerBot

10mo ago
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Crystals

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Wiki User

15y ago
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Q: What are most rocks made out of?
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