Minerals are solid substances with a fixed crystal structure and a unique chemical composition. Processing ore sometimes involves crushing or grinding minerals. Prehistoric people used flints for knives and arrowheads. The average American house contains about 250,000 pounds of minerals. Early Human culture used rocks as simple tools as early as 2. 6 million years ago.
What are minerals?
Minerals are solid substances and are characterized by a fixed crystal structure and a unique chemical composition.
Early hominids used rocks as simple tools before the advent of modern civilization where other materials were used.
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