igneous
Granite
Felsic intrusive igneous rock
Hardness: 6 on the Mohs scale. Color: Varies widely (pink, gray, white) with dark mineral specks. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None distinct as a rock, composed of minerals with varying cleavage.
- Hardness
- 6 on the Mohs scale
- Color
- Varies widely (pink, gray, white) with dark mineral specks
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6 on the Mohs scale. Color: Varies widely (pink, gray, white) with dark mineral specks. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None distinct as a rock, composed of minerals with varying cleavage.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides beneath the Earth's surface, typically over millions of years.
Uses & applications
Widely used in construction, architecture, countertops, monuments, and curbing due to its high durability and aesthetic appeal.
Geological facts
Granite is the most common rock of the Earth's continental crust and is rarely found on any other planet. Its interlocking crystals make it extremely strong and resistant to weathering.
Field identification & locations
Can be identified in the field by its visible interlocking grains of quartz, feldspar, and micas (biotite/muscovite). Found globally in continental shields and mountain roots.
