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Science
Earth Science
Geology
Minerals and Rocks
Rocks
What Are the Three Main Rock Groups?
Igneous Rocks
Classification of Igneous Rocks
Mineralogy to Classify Igneous Rocks
Silica vs. Iron Content in Igneous Rocks
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Silica: a hard, nonreactive, colorless compound that occurs as the mineral quartz and as a principal constituent of sandstone and other rocks. Iron: a strong, hard magnetic silv…
By Nina Jiang
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