igneous
Granite
Granite (Mainly Quartz, Feldspar, and Mica)
Hardness: 6-7 on Mohs scale; Color: White/light grey base with dark speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- White/light grey base with dark speckles
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 on Mohs scale; Color: White/light grey base with dark speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface (intrusive). They can range from Precambrian to Cenozoic geological ages depending on the specific pluton location.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stone, curbing, and as a decorative stone in monuments.
Geological facts
Granite makes up a large portion of the Earth's continental crust. It is one of the hardest and most durable natural stones available.
Field identification & locations
Identify in the field by its visible interlocking crystals of varied colors (usually white, pink, and grey). It is found globally in mountainous regions and continental shields. Look for a 'salt and pepper' appearance.
