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How does silica from molten material affect the color of igneous rock?

Answer:
The majority of minerals associated with igneous rocks are silicates. It is the proportion of certain silicate minerals that affects the color of igneous rocks. Igneous rocks that are high in orthoclase feldspar, quartz, and muscovite mica will be lighter in color than igneous rocks that are higher in olivine, pyroxene, amphibole, and biotite mica.
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First answer by Jones1rocks. Last edit by Jones1rocks. Contributor trust: 1563 [recommend contributor recommended]. Question popularity: 7 [recommend question].

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