igneous
Granite
Granite
Hardness: 6-7 Mohs; Color: Salt and pepper (white, gray, black); Luster: Dull to vitreous; Crystal structure: Phaneritic (visible interlocking crystals); Specific gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper (white, gray, black)
- Luster
- Dull to vitreous
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper (white, gray, black); Luster: Dull to vitreous; Crystal structure: Phaneritic (visible interlocking crystals); Specific gravity: 2.63-2.75
Formation & geological history
Intrusive igneous rock formed from the slow cooling of silica-rich magma deep underground. Generally formed during mountain-building events over millions of years.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, and monuments due to its durability.
Geological facts
Granite makes up a large part of the Earth's continental crust. It is one of the hardest natural stones and has been used since ancient Egyptian times for building temples and obelisks.
Field identification & locations
Identify by its coarse-grained texture and multicolore quartz, feldspar, and mica crystals. Very common in mountainous regions or glacial deposits.
