igneous
Granite
Granite
Hardness: 6-7 Mohs; Color: Grayish-white with dark specks; Luster: Dull to vitreous; Crystal Structure: Phaneritic (coarsegrained); Composition: Quartz, Alkali Feldspar, and Plagioclase.
- Hardness
- 6-7 Mohs
- Color
- Grayish-white with dark specks
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Grayish-white with dark specks; Luster: Dull to vitreous; Crystal Structure: Phaneritic (coarsegrained); Composition: Quartz, Alkali Feldspar, and Plagioclase.
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface (intrusive). Found in continental crust, often appearing in mountain ranges after erosion.
Uses & applications
Extensively used in construction, countertops, monuments, curbing, and as crushed stone for road base.
Geological facts
Granite is one of the most common rocks in the Earth's crust. It is extremely durable and can withstand significant weathering over centuries.
Field identification & locations
Identify by its interlocking 'salt and pepper' crystalline texture. Commonly found in mountainous regions or as glacial erratics.
