Open Directory - Science:Earth Sciences:Geology:Rocks and Minerals:Non-Metallic Deposits


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Top: Science: Earth_Sciences: Geology: Rocks_and_Minerals: Non-Metallic_Deposits

Examples of non-metallic rocks and minerals of economic interest include coal, gemstones, construction aggregate (gravel or riprap), building stone, salt, gypsum and anhydrite, industrial-grade clays, fluorspar, phosphate, nitrate, and barite. Peat moss is included here because it is a fossil resource (i.e., it is mined faster than it is formed) similar in many respects to coal.

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