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Why is feldspar the most abundant mineral when quartz is the most common?

April 26, 2017abundant common feldspar Mineral Quartz

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Why is feldspar the most abundant mineral when quartz is the most common?

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Actually, feldspar IS the most common – it averages approximately 60% of all igneous rocks. Quartz is also common, but is limited to felsic rocks (granite, etc.). Some of the many different varieties of feldspar occur in all magma types (expect ultramafic).