Granite is definitively a natural stone, but it is an entirely distinct geological category from marble, sharing no chemical or mineral similarities. Granite is a hard igneous rock formed from slowly cooled magma rich in quartz, feldspar, and mica, giving it exceptional scratch and acid resistance. Marble is a metamorphic rock formed from recrystallized limestone composed of calcium carbonate, making it softer and highly sensitive to acids. They represent two completely different geological classifications of natural stone.
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