igneous
Granite
Intrusive igneous rock
Hardness: 6-7 on Mohs scale. Color: Typically pink, white, grey, or black speckled. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Cleavage: None distinct as a rock, composed of feldspar and quartz with cleavage. Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Typically pink, white, grey, or black speckled
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Typically pink, white, grey, or black speckled. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained visible crystals). Cleavage: None distinct as a rock, composed of feldspar and quartz with cleavage. Specific gravity: 2.65-2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma below the Earth's surface, typically over millions of years, often associated with continental mountain-building processes.
Uses & applications
Widely used in construction, countertops, flooring, monuments, and landscaping due to its high durability.
Geological facts
Granite is the most common rock of the Earth's continental crust and is frequently found in major mountain ranges around the world.
Field identification & locations
Easily identified by its distinct speckled appearance containing pink or white feldspar, translucent quartz, and dark biotite or amphibole minerals. Found globally in shield areas and mountain roots.
