Minerals, crystals and gemstones
A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure formed by geological processes (in contrast, a rock is an aggregate of one or more minerals). The term "mineral" encompasses both the material's chemical composition and its internal structure. Minerals range in composition from pure elements and simple salts to very complex silicates with hundreds of known varieties. The study of minerals is called mineralogy.
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Minerals_Crystals and gemstones.pdf | 363.42 KB |