igneous
Granite
Phaneritic intrusive igneous rock
Hardness: 6-7 Mohs; Color: Salt and pepper/Greyish-white; Luster: Vitreous to dull; Crystal structure: Phaneritic (visible crystals of quartz, feldspar, and mica); Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper/Greyish-white
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper/Greyish-white; Luster: Vitreous to dull; Crystal structure: Phaneritic (visible crystals of quartz, feldspar, and mica); Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface in continental crustal environments. Often millions to billions of years old depending on the pluton age.
Uses & applications
Used extensively in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite makes up a large portion of the Earth's continental crust. It is one of the hardest and most plentiful stones found on the planet.
Field identification & locations
Identify by looking for a speckled 'salt and pepper' appearance with visible interlocking crystals of white/pink feldspar and clear quartz. Commonly found in mountain ranges and eroded shield areas.
