igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
Hardness: 6-7 Mohs; Color: Pink, reddish-orange, white, and grey/black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Composition: Quartz, Potassium Feldspar (Orthoclase), Plagioclase, and Mica.
- Hardness
- 6-7 Mohs
- Color
- Pink, reddish-orange, white, and grey/black
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, reddish-orange, white, and grey/black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Composition: Quartz, Potassium Feldspar (Orthoclase), Plagioclase, and Mica.
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface (intrusive). The pink color is specifically due to the high abundance of potassium-rich orthoclase feldspar. Usually found in continental crust and mountain ranges.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stone, monuments, and as a decorative rock in landscaping. Smaller specimens are collected for educational or amateur geology purposes.
Geological facts
Granite is the most common igneous rock found on the Earth's surface and makes up a significant portion of the continental crust. Granite is often used for curling stones because of its durability.
Field identification & locations
Identify in the field by its interlocking visible crystals. Look for the distinct speckled pattern of light and dark minerals; it will scratch glass and does not react with acid. Common in glacial till or mountain outcrops.
