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A naturally occurring element or compound that has a crystalline form and has been produced by geological processes.
A naturally occurring element or compound that has a crystalline form and has been produced by geological processes. Minerals have a precise chemical composition, unlike rocks which are mixtures of various minerals. Examples of minerals include quartz, composed of silicon dioxide; graphite, which is pure carbon; and gypsum, calcium sulphate dihydrate.
Minerals have a precise chemical composition, unlike rocks which are mixtures of various minerals. Examples of minerals include quartz, composed of silicon dioxide; graphite, which is pure carbon; and gypsum, calcium sulphate dihydrate.