Quartz Vs. Granite: Density, Hardness, And Other Key Differences

Quartz, a single mineral with a hexagonal structure, is denser and harder than granite, which is an igneous rock composed of quartz, feldspar, and mica. Granite often contains visible crystals and has a higher density than quartz. Quartz is translucent, while granite is opaque. Both materials have excellent heat resistance, but quartz is more resistant to acids than granite.

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