igneous
Pink Granite
Phaneritic Plutonic Felsic Rock (K-Feldspar Granite)
Hardness: 6-7 on Mohs scale; Color: Pink, reddish, and grey; Luster: Vitreous to dull; Structure: Phaneritic (visible crystals of quartz, feldspar, and mica); Cleavage: Perfect in two directions for feldspar; Specific Gravity: 2.63 to 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish, and grey
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish, and grey; Luster: Vitreous to dull; Structure: Phaneritic (visible crystals of quartz, feldspar, and mica); Cleavage: Perfect in two directions for feldspar; Specific Gravity: 2.63 to 2.75.
Formation & geological history
Formed by the slow cooling of silica-rich magma deep underground (plutonic). The pink hue is caused by an abundance of potassium feldspar (orthoclase). Found in continental crust structures across all geological eras, notably Precambrian shields.
Uses & applications
Extensively used in construction for countertops, floor tiles, and monuments due to its durability. High-quality specimens are popular for rock collections.
Geological facts
Granite makes up the majority of the Earth's continental crust. The pink color specifically indicates a high concentration of orthoclase feldspar rather than plagioclase.
Field identification & locations
Identified in the field by its speckled 'salt and pepper' appearance with prominent pink crystals and lack of bedding or foliation. Commonly found in mountainous regions or glacial deposits.
