igneous
Red Granite
Felsic Intrusive Igneous Rock
Hardness: 6-7 on Mohs scale. Color: Pink to reddish with white and dark flecks. Luster: Vitreous to dull. Crystal structure: Phanertic (coarse-grained, visible mineral crystals of quartz, alkali feldspar, and plagioclase). Specific gravity: 2.65 - 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink to reddish with white and dark flecks
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Pink to reddish with white and dark flecks. Luster: Vitreous to dull. Crystal structure: Phanertic (coarse-grained, visible mineral crystals of quartz, alkali feldspar, and plagioclase). Specific gravity: 2.65 - 2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma rich in silica and alkali feldspar deep beneath the Earth's surface. Geological age ranges from Precambrian to Cenozoic.
Uses & applications
Widely used in construction, architectural building facades, monuments, countertops, paving stones, and interior design.
Geological facts
Red granite gets its characteristic pink or red color from an abundance of potassium feldspar. It is one of the most common continental crust rocks on Earth.
Field identification & locations
Identified by its interlocking, coarse-grained crystals of pink/red feldspar, clear to smoky quartz, and dark biotite mica. Found globally in continental shields and mountain roots.
