igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on Mohs scale; Color: Varies widely (pink, white, grey, black) due to mineral content; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained, visible crystals); Specific Gravity: 2.65-2.75
- Hardness
- 6-7 on Mohs scale
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Varies widely (pink, white, grey, black) due to mineral content; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained, visible crystals); Specific Gravity: 2.65-2.75
Formation & geological history
Formed from the slow cooling and solidification of magma rich in silica and alkali metals deep beneath the Earth's surface over millions of years.
Uses & applications
Widely used in construction, monuments, flooring, countertops, and decorative stone due to its durability and aesthetic appeal.
Geological facts
Granite is the most common rock of the Earth's continental crust and is exceptionally resistant to weathering compared to sedimentary rocks.
Field identification & locations
Easily identifiable in the field by its interlocking, visible grains of quartz, feldspar, and dark minerals like biotite mica or hornblende. Found globally in major mountain ranges and shields.
