igneous
Red Granite
Granite (Felsic intrusive igneous rock)
Hardness of 6 on the Mohs scale. Pink to red color due to potassium feldspar, with quartz and biotite mica. Dull to subvitreous luster. Phaneritic (coarse-grained) crystal structure. Specific gravity is approximately 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale. Pink to red color due to potassium feldspar, with quartz and biotite mica. Dull to subvitreous luster. Phaneritic (coarse-grained) crystal structure. Specific gravity is approximately 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling and crystallization of magma rich in silica and alkali elements deep beneath the Earth's crust, typically over millions of years.
Uses & applications
Commonly used in construction, architectural building facades, dimension stone, monuments, countertops, and landscaping.
Geological facts
Red granite gets its distinctive reddish hue from the high concentration of potassium feldspar (orthoclase). It is one of the most durable and weather-resistant natural building stones.
Field identification & locations
Easily identified by its speckled, coarse-grained appearance featuring pink or red crystals mixed with clear/grey quartz and dark flecks of mica. Found globally in major continental shields and mountain ranges.
