igneous
Granite
Granite
Hardness: 6-7 on Mohs scale; Color: Pink, gray, or white with dark speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, gray, or white with dark speckles
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, gray, or white with dark speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface (intrusive). Usually found in continental crust and mountain ranges from various geological eras.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, monuments, and curbing due to its durability.
Geological facts
Granite makes up a large part of the Earth's continental crust and is one of the hardest natural stones. Mount Rushmore is carved into a granite formation.
Field identification & locations
Identify by its interlocking crystals of quartz (clear/gray), feldspar (pink/white), and mica (black/shiny). Common in areas with exposed batholiths.
