Minerals generally occur in these forms: (i) Igneous and metamorphic rocks: Minerals may occur in the cracks, crevices, faults or joints. ... In most cases, they are formed when minerals in liquid, molten and gaseous forms are forced upward through cavities towards the earth's surface
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Minerals generally occur in these forms: (i) Igneous and metamorphic rocks: Minerals may occur in the cracks, crevices, faults or joints. ... In most cases, they are formed when minerals in liquid, molten and gaseous forms are forced upward through cavities towards the earth's surface