igneous
Pink Granite
Granite (Felsic Plutonic Igneous Rock)
Hardness: 6-7 on the Mohs scale. Color: Pinkish-red to reddish-brown mixed with white and dark specks. Luster: Vitreous to dull. Texture: Phaneritic (medium- to coarse-grained mineral crystals). Composition: Potassium feldspar (orthoclase), quartz, plagioclase, and minor mica/amphibole.
- Hardness
- 6-7 on the Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on the Mohs scale. Color: Pinkish-red to reddish-brown mixed with white and dark specks. Luster: Vitreous to dull. Texture: Phaneritic (medium- to coarse-grained mineral crystals). Composition: Potassium feldspar (orthoclase), quartz, plagioclase, and minor mica/amphibole.
Formation & geological history
Formed by the slow crystallization of felsic magma deep beneath Earth's surface (plutonic formation). The pink color is caused by an abundance of potassium feldspar (orthoclase). Subdued or rounded surfaces often indicate secondary weathering from glacial or fluvial transport.
Uses & applications
Widely used as a dimension stone in construction, counter tops, monuments, curb material, decorative landscaping, and crushed stone aggregate.
Geological facts
Granite makes up a major portion of Earth's continental crust. Highly durable, it has been used in construction since ancient times, including the outer casing of some Egyptian pyramids.
Field identification & locations
Identified in the field by its visible interlocking mineral grains (quartz and pink feldspar) and high durability. Common in continental shield areas and mountain belts worldwide.
