igneous
Granite
Intrusive Igneous Rock
Hardness: 6 on Mohs scale; Color: Pink, gray, white, or green with dark specks; Luster: Dull to sub-vitreous; Crystal Structure: Phaneritic (coarse-grained); Cleavage: None distinct for the rock as a whole; Specific Gravity: 2.65 - 2.75
- Hardness
- 6 on Mohs scale
- Color
- Pink, gray, white, or green with dark specks
- Luster
- Dull to sub-vitreous
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Physical properties
Hardness: 6 on Mohs scale; Color: Pink, gray, white, or green with dark specks; Luster: Dull to sub-vitreous; Crystal Structure: Phaneritic (coarse-grained); Cleavage: None distinct for the rock as a whole; Specific Gravity: 2.65 - 2.75
Formation & geological history
Formed from the slow cooling and solidification of magma rich in silica and alkali metal oxides beneath the Earth's surface. Geological age ranges from Precambrian to recent.
Uses & applications
Commonly used in construction, architectural facades, monuments, countertops, paving stones, and landscaping.
Geological facts
Granite is the most common intrusive rock of Earth's continental crust and is famous for its durability, resistance to erosion, and structural strength.
Field identification & locations
Easily identified by its speckled appearance, visible interlocking mineral crystals (quartz, feldspar, and mica), and high hardness. Found worldwide in continental shields and mountain belts.
