igneous
Granite
Intrusive Igneous Rock
Hardness: 6-7 on Mohs scale. Color: Light gray, pink, or white with dark speckles. Luster: Dull to vitreous. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None (fractures unevenly). Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Light gray, pink, or white with dark speckles
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Light gray, pink, or white with dark speckles. Luster: Dull to vitreous. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None (fractures unevenly). Specific gravity: 2.65-2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma rich in silica and alkali aluminum silicates beneath the Earth's surface over millions of years.
Uses & applications
Widely used in construction, architecture, countertops, monuments, and curbing due to its durability and aesthetic appeal.
Geological facts
Granite is the most common rock of the Earth's continental crust and is frequently found in major mountain ranges. It is resistant to weathering and erosion.
Field identification & locations
Easily identified by its characteristic 'salt and pepper' speckled appearance with interlocking crystals of quartz, feldspar, and micas. Found globally in shields and orogenic belts.
