igneous
Granite Tile (Commercial Granite)
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
Hardness: 6-7 (Mohs); Color: Mottled grey, white, black, and brown; Luster: Vitreous/Polished; Crystal Structure: Phaneritic (coarse-grained); Cleavage: No true cleavage (conchoidal fracture); Specific Gravity: 2.6-2.7
- Hardness
- 6-7 (Mohs)
- Color
- Mottled grey, white, black, and brown
- Luster
- Vitreous/Polished
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Physical properties
Hardness: 6-7 (Mohs); Color: Mottled grey, white, black, and brown; Luster: Vitreous/Polished; Crystal Structure: Phaneritic (coarse-grained); Cleavage: No true cleavage (conchoidal fracture); Specific Gravity: 2.6-2.7
Formation & geological history
Formed through the slow crystallization of magma below the Earth's surface. Often hundreds of millions to billions of years old, found in continental crust.
Uses & applications
Primarily used in construction for flooring, countertops, monument stones, and exterior cladding due to its durability and resistance to weathering.
Geological facts
Geologically reaching heights like Mount Rushmore and Yosemite's El Capitan, granite is the most common rock found in the Earth's continental crust.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance and interlocking visible crystals of quartz, feldspar, and mica. Found globally in mountainous regions and shield areas.
