Define the following terms :

(i) Mineral

(ii) Ores and

(iii) Gangue

(i) Mineral — Minerals are naturally occurring, homogenous solid inorganic substance that have a definite chemical composition with its own chemical and physical properties.

(ii) Ores — Ores are minerals from which metals are extracted commercially at a comparatively lower cost and with minimum effort.

(iii) Gangue — The earthly impurities like soil, mud, sand, silica (SiO₂), limestone, rocks, etc. that are mixed with valuable minerals in an ore deposit are called gangue or matrix.