igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on Mohs scale. Color: Varies widely including pink, white, grey, and black depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained, visible crystals). Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on Mohs scale
- Luster
- Dull to glassy
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Varies widely including pink, white, grey, and black depending on mineral content. Luster: Dull to glassy. Crystal structure: Phaneritic (coarse-grained, visible crystals). Specific gravity: 2.65-2.75.
Formation & geological history
Formed from the slow cooling and crystallization of magma rich in silica and alkali metals far beneath the Earth's surface over millions of years.
Uses & applications
Widely used in construction, architectural buildings, countertops, monuments, and paving stones.
Geological facts
Granite is the most common igneous rock in the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its speckled appearance showing interlocking crystals of quartz, feldspar, and mica. Found globally in major mountain ranges and shields.
