igneous
Granite
Intrusive Igneous Rock
Hardness: 6 on the Mohs scale. Color: Varies from pink to gray depending on its chemistry. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained) with visible quartz, feldspar, and mica crystals. Specific gravity: 2.65 to 2.75.
- Hardness
- 6 on the Mohs scale
- Color
- Varies from pink to gray depending on its chemistry
- Luster
- Vitreous to dull
Identified More igneous →
Explore Granite in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6 on the Mohs scale. Color: Varies from pink to gray depending on its chemistry. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained) with visible quartz, feldspar, and mica crystals. Specific gravity: 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides deep underground, allowing large crystals to grow. Geological age varies widely from Precambrian to Cenozoic.
Uses & applications
Widely used in construction, countertops, monuments, floor tiles, and curbing due to its high durability.
Geological facts
Granite is the most common rock type in the Earth's continental crust and is exceptionally resistant to weathering.
Field identification & locations
Can be identified by the distinct interlocking crystals of quartz (glassy gray), feldspar (pink or white), and biotite mica (black flakes). Found globally in continental shields and mountain ranges.
