igneous
Granite
Phaneritic Igneous Rock (Granite)
Hardness: 6-7 on Mohs scale; Color: mottled cream, tan, black, and orange; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- mottled cream, tan, black, and orange
- 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: 6-7 on Mohs scale; Color: mottled cream, tan, black, and orange; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. This intrusive igneous rock is typically found in continental crust and is millions of years old.
Uses & applications
Primarily used in construction for countertops, floor tiles, paving stones, and memorial monuments due to its durability.
Geological facts
Granite makes up the core of most mountain ranges and is one of the most common rocks in the continental crust. The white/tan minerals are feldspar, the clear/grey is quartz, and the black flecks are biotite mica or hornblende.
Field identification & locations
Identify by its interlocking crystalline texture containing quartz and feldspar. Found globally in batholiths and mountain ranges. This specific specimen is polished into a decorative slab.
