igneous
Granite
Phaneritic Igneous Rock (primarily Quartz, Feldspar, Mica)
Hardness: 6-7 Mohs; Color: Greyish-white with dark flecks; Luster: Dull to vitreous; Crystal structure: Phaneritic (visible crystals); Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Greyish-white with dark flecks
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Greyish-white with dark flecks; Luster: Dull to vitreous; Crystal structure: Phaneritic (visible crystals); Specific gravity: 2.63-2.75
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface. These are intrusive rocks that cool over thousands to millions of years, allowing large crystal growth.
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 the most common igneous rock found in Earth's continental crust. It is the rock that makes up the bulk of many mountain ranges, such as the Sierra Nevada.
Field identification & locations
Identify by its 'salt and pepper' appearance and visible interlocking crystals of quartz and feldspar. Found globally in continental shields and mountain belts.
