Answer:
A
mineral is defined as a homogenous, naturally occurring substance with a
definable internal structure.
In igneous and metamorphic rocks, minerals may occur in the cracks,
crevices, faults or joints.
The smaller occurrences are called Veins and the larger
are called Lodes. In most cases, they are formed when minerals in liquid/molten
and gaseous forms are forced upward through cavities towards the Earth's
surface. They cool and solidify as rfley rise.
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