Minerals
The term ‘Mineral’ means a class of substances occurring in nature, of definite chemical composition and usually, a characteristic crystal structure, but sometimes also includes rocks formed by these substances. A mineral is an element or chemical compound that has been formed as a result of geological processes. Mineral resources are found on or in the earth in reasonable amounts and are mined for their potential uses or their intrinsic values. Mineral resources are non-renewable and include metals (e.g. iron, copper, and aluminum), and non-metals -e.g. salt, gypsum, clay, sand, phosphates).
- Minerals in general have been categorized into three classes: fuel, ....
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