igneous
Pink Granite
Granite (composed primarily of Orthoclase Felspar, Quartz, and Plagioclase)
Hardness: 6-7 on Mohs scale; Color: Pink, orange, gray, and black speckles; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions at 90 degrees in feldspar crystals.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, orange, gray, and black speckles
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, orange, gray, and black speckles; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions at 90 degrees in feldspar crystals.
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface (intrusive). The pink color comes from an abundance of potassium feldspar. Formation can occur throughout various geological eras, notably during orogenic events.
Uses & applications
Widely used for construction, countertops, floor tiles, paving stones, monuments, and as crushed stone for road base.
Geological facts
Granite makes up a large part of the Earth's continental crust. Mount Rushmore is carved into a granite batholith. Some granites are among the oldest rocks on Earth, dating back billions of years.
Field identification & locations
Identify by its coarse grain and the distinct pink or salmon color of the feldspar crystals. It is found globally in mountainous regions and shield areas like the Canadian Shield or the Scottish Highlands. Look for a 'salt and pepper' appearance with red/pink hues.
