igneous
Pink Granite
Phaneritic intrusive felsic igneous rock
Hardness: 6-7 on Mohs scale; Color: Pink, red, black, and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) composed primarily of potassium feldspar, quartz, and mica; Specific Gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, red, black, and white
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, red, black, and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) composed primarily of potassium feldspar, quartz, and mica; Specific Gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. The pink color is due to a high concentration of potassium feldspar (orthoclase). These rocks are found in continental crust worldwide and can date back billions of years.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments. Also a popular specimen for educational kits and amateur geology collections.
Geological facts
Granite is one of the hardest and most durable natural stones available. It makes up a large portion of the Earth's continental crust and is often the core of mountain ranges. The pink variety is particularly prized for its aesthetic appeal in architecture.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance with prominent pink or reddish grains. It will not react with acid and is hard enough to scratch glass. Found in batholiths and mountain cores.
