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How does granite’s mineral hardness scale rating compare?
Granite is one of the most durable and widely used natural stones, prized for its strength and aesthetic appeal. But how does its hardness compare to other minerals? On the Mohs scale of mineral hardness, which ranges from 1 (softest) to 10 (hardest), granite typically scores between 6 and 7. This places it above materials like calcite (3) and feldspar (6) but below quartz (7) and diamond (10).
The primary minerals in granite—quartz, feldspar, and mica—contribute to its overall hardness. Quartz, making up about 20-60% of granite, is a key factor in its durability, as it ranks 7 on the Mohs scale. Feldspar, another major component, ranges between 6 and 6.5, while mica is softer at 2-3. The combination of these minerals gives granite its notable resistance to scratching and wear, making it ideal for countertops, flooring, and outdoor applications.
Compared to other popular countertop materials, granite outperforms marble (3-5 on the Mohs scale) but is slightly less hard than quartzite (7). This balance of hardness and beauty explains why granite remains a top choice for both residential and commercial projects. Understanding its mineral composition and hardness rating helps in selecting the right stone for long-lasting use.
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