![]() ![]() The two major categories of modern mining include surface mining and underground mining. This mix of rock and minerals is usually carried away from the mine together, then later processed and refined to isolate the desired mineral. The minerals are valuable in their pure form, but in the earth they are mixed with other, unwanted rocks and minerals. A mineral is typically an inorganic substance that has a specific chemical composition and crystal structure. These profitable substances that are mined from the earth are called minerals. The mining of gold and copper also dates back to prehistoric times. Prehistoric people first mined flint, which was ideal for tools and weapons since it breaks into shards with sharp edges. The process of mining dates back to prehistoric times. Iron ore is the material from which the metal iron is produced. Some examples of substances that are mined include coal, gold, or iron ore. Mining is the process of extracting useful materials from the earth. ![]()
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