igneous
Granite
Granite (Phaneritic igneous rock)
Hardness: 6-7 Mohs; Color: Salt and pepper (pink, white, gray, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63 to 2.75 g/cm3.
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper (pink, white, gray, black)
- Luster
- Vitreous to dull
Identified More igneous →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper (pink, white, gray, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific Gravity: 2.63 to 2.75 g/cm3.
Formation & geological history
Formed from the slow crystallization of magma below the Earth's surface (intrusive). It is often found in the continental crust and can date back billions of years to the Precambrian era.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite is the most common igneous rock found on Earth's continents. The iconic peaks of Yosemite National Park and the faces on Mount Rushmore are carved from granite.
Field identification & locations
Identify in the field by its visible interlocking crystals of quartz (clear/gray), feldspar (pink/white), and mica (black/shiny). It is ubiquitous in mountainous regions and continental shields.
