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2015-12-11T15:50:10+05:30

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The minerals are mainly formed in igneous and metamorphic rocks when molten lava forces itself up the cracks and crevices of these rocks and cools down while nearing the surface. The lava contains several kinds of minerals and these minerals on cooling in the cracks of the rocks becomes a part of these rocks. minerals like lead, copper, zinc, tin etc are found in igneous and metamorphic rocks due to this reason.
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