igneous
Pink Granite
Phaneritic Acidic Igneous Rock (Rich in K-feldspar)
Hardness: 6-7 (Mohs scale); Color: Pink, reddish, grey, and black mottled; Luster: Glassy to dull; Crystal structure: Phaneritic (coarse crystals visible); Specific Gravity: 2.63 - 2.75
- Hardness
- 6-7 (Mohs scale)
- Color
- Pink, reddish, grey, and black mottled
- Luster
- Glassy to dull
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Pink, reddish, grey, and black mottled; Luster: Glassy to dull; Crystal structure: Phaneritic (coarse crystals visible); Specific Gravity: 2.63 - 2.75
Formation & geological history
Formed from the slow cooling of silica-rich magma deep underground (intrusive). Contains potassium feldspar, quartz, and minor mica/amphibole. Typical age ranges from hundreds of millions to billions of years.
Uses & applications
Widely used in construction, countertops, monuments, flooring, and as crushed stone for road building and landscaping.
Geological facts
Pink granite is the state rock of New Hampshire. The pink color is specifically caused by high concentrations of potassium feldspar (orthoclase).
Field identification & locations
Identify by its interlocking 'salt and pepper' crystalline texture and the dominant pink/salmon hue. Found globally in continental crust/cratons. Common in areas like Scotland, Texas, and Scandinavia.
