igneous
Granite
Phaneritic Felsic Igneous Rock
Hardness: 6-7 on Mohs scale. Color: Spotted pink, gray, and white. Luster: Dull to vitreous. Crystal structure: Phaneritic (visible interlocking crystals of quartz, feldspar, and mica). Specific gravity: 2.63-2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Spotted pink, gray, and white
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Spotted pink, gray, and white. Luster: Dull to vitreous. Crystal structure: Phaneritic (visible interlocking crystals of quartz, feldspar, and mica). Specific gravity: 2.63-2.75.
Formation & geological history
Formed from the slow cooling and crystallization of magma deep beneath the Earth's surface (plutonic). Found in continental crust, often forming the cores of mountain ranges.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite is one of the hardest substances in the world. It is so resistant to weathering that it forms famous landmarks like Yosemite's Half Dome and Mount Rushmore.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance and visible interlocking crystals. It is ubiquitous in mountainous or glaciated regions worldwide.
