igneous
Pink Granite
Phaneritic Felsic Igneous Rock
Hardness: 6-7 Mohs; Color: Mottled pink, black, and white; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Mottled pink, black, and white
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Mottled pink, black, and white; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
Formation & geological history
Formed from the slow cooling and solidification of magma deep within the Earth's crust (plutonic). The pink color comes from potassium feldspar (orthoclase). Found in continental crust across all geological ages.
Uses & applications
Construction (countertops, monuments), architectural stone, aggregate, and small polished specimens for collectors.
Geological facts
Granite is the most common rock found in the Earth's continental crust. Its pink color specifically indicates a high concentration of potassium-rich feldspar compared to grey granites.
Field identification & locations
Identify by its interlocking crystalline texture and hard mineral components that scratch glass. Found commonly in mountainous regions or glacial deposits. Collectors often find these as tumbled river stones.
