igneous
Pink Granite
Phaneritic Felsic Igneous Rock
Hardness: 6-7 on Mohs scale; Color: Pink, reddish, white, and grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in two directions for feldspar components.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish, white, and grey
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish, white, and grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in two directions for feldspar components.
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface (intrusive). Composed primarily of potassium feldspar (orthoclase), quartz, and plagioclase feldspar, often found in continental crust and mountain ranges from various geological eras.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, monuments, and curbing. Also used as aggregate in heavy engineering.
Geological facts
Granite is one of the hardest substances in the world, second only to diamonds. It makes up a large portion of the continental crust and is responsible for many of the world's most famous natural landmarks like Yosemite's Half Dome.
Field identification & locations
Identify in the field by its interlocking coarse grains of pink/orange feldspar and translucent quartz. Common in glacial till or mountain outcrops. Collectors should look for unique mineral inclusions like mica or hornblende.
