igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Potassium Feldspar)
Hardness: 6-7 Mohs; Color: Pink, reddish-pink, with gray and black specks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Indistinct; Specific Gravity: 2.63 - 2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, reddish-pink, with gray and black specks
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, reddish-pink, with gray and black specks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Indistinct; Specific Gravity: 2.63 - 2.75
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface (intrusive). The pink color is derived from an abundance of potassium feldspar (orthoclase). These rocks are often millions to billions of years old, forming the basement of continental crust.
Uses & applications
Widely used in construction, countertops, monuments, curbing, and as decorative gravel. It is highly valued for its durability and aesthetic appeal in architecture.
Geological facts
Pink granite is the state rock of New Hampshire (the Granite State). Famous formations include the Enchanted Rock in Texas and various peaks in the Yosemite National Park.
Field identification & locations
Identify in the field by its interlocking coarse grains and distinct pink feldspar crystals. It is found in continental shields and mountain ranges globally. Beginners should look for the 'salt and pepper' look with a pinkish hue.
