igneous
Pink Granite
Granite (Felsic Plutonic Rock)
Hardness: 6-7 Mohs; Color: Pink, orange-red, white, and black speckled; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, orange-red, white, and black speckled
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, orange-red, white, and black speckled; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. The pink color is primarily caused by an abundance of potassium feldspar (orthoclase). Granites are found throughout all geological ages, primarily in continental crust.
Uses & applications
Extensively used in construction, countertops, monuments, curbing, and as crushed stone for road aggregate. Polished specimens are used for decorative architecture.
Geological facts
Granite is the most common igneous rock found at Earth's surface and makes up a significant portion of the continental crust. The pink hue specifically indicates a high K-feldspar content relative to plagioclase.
Field identification & locations
Identify by the visible interlocking crystals of pink feldspar, clear quartz, and dark mica or amphibole. Commonly found in mountainous regions or shield areas like the Rockies or the Appalachians.
