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Encyclopedic entry. Ore is a deposit in the Earth’s crust of one or more valuable minerals. The most valuable ore deposits contain metals crucial to industry and ...

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What are examples of metallic and non metallic minerals. Probably the most famous metallic mineral is Pyrite, or Fool's Gold. Hematite, which is often used in jewelry ...

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In the bauxite refining process, the aluminum-bearing minerals in bauxite are converted in a multiple-step process to alumina (Al2O3). Alumina can be smelted to form ...

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