igneous
Granite
Phaneritic plutonic rock (dominated by Quartz and Feldspar)
Hardness: 6-7 on Mohs scale; Color: Pinkish-brown with white and grey grains; Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pinkish-brown with white and grey grains
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pinkish-brown with white and grey grains; Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of magma below the Earth's surface in continental crust. This specimen shows a weathered, rounded exterior typical of river or glacial transport.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stone, curbing, and as a decorative architectural facade material.
Geological facts
Granite is one of the most common rocks on the Earth's surface and makes up a large portion of the continental crust. It is incredibly durable and resistant to acid rain.
Field identification & locations
Identify in the field by its 'salt and pepper' appearance and visible interlocking crystals of quartz, feldspar, and mica. It is found in mountain ranges and ancient continental shields.
