igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on Mohs scale. Color: Varies widely (pink, white, gray, black) depending on mineral composition. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained, visible crystals). Specific gravity: 2.65-2.75.
- Hardness
- 6-7 on Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Varies widely (pink, white, gray, black) depending on mineral composition. Luster: Vitreous to dull. 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, trapped beneath the Earth's surface. Usually Precambrian to Cenozoic in age.
Uses & applications
Widely used in construction, architectural facades, monument building, countertops, and decorative stone due to its durability and hardness.
Geological facts
Granite makes up a major portion of the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Easily identified by its speckled appearance, consisting primarily of quartz, feldspar, and mica. Found worldwide in continental shields and mountain belts.
