"Rocks and minerals are natural resources found in Earth. They are used as fuel, for building, and to make items sush as smartphones. Some minerals, including gold and silver, are prized for their beauty. Find out about the different types of rocks and minerals, how they formed, how they are used, and what we can do to conserve and recycle them"--
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Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.