How does the presence of silica in granite affect its resistance to acids?

Granite's resistance to acids is significantly influenced by its silica content, primarily in the form of quartz. Silica, a hard and chemically inert mineral, makes up a substantial portion of granite's composition, often ranging from 20% to 60%. When exposed to acidic substances, the silica-rich quartz crystals in granite remain largely unaffected, as they are highly resistant to chemical reactions. This property helps granite maintain its structural integrity and appearance even in environments with acidic exposure. In contrast, other minerals in granite, such as feldspar or mica, may react weakly with acids, but the dominant silica content ensures overall durability. Thus, higher silica levels in granite directly correlate with better acid resistance, making it a preferred material for countertops, flooring, and outdoor applications.