igneous
Granite
Granite
Hardness: 6-7 Mohs; Color: Salt and pepper (pink, gray, white, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarsegrained) with visible crystals of quartz, feldspar, and mica.
- Hardness
- 6-7 Mohs
- Color
- Salt and pepper (pink, gray, white, black)
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 Mohs; Color: Salt and pepper (pink, gray, white, black); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarsegrained) with visible crystals of quartz, feldspar, and mica.
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. It is a plutonic intrusive rock that can form over millions of years during tectonic orogeny.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, monuments, and as aggregate in road base.
Geological facts
Granite makes up a large portion of the Earth's continental crust. It is one of the hardest and most durable natural stones, making it a favorite for architectural endurance.
Field identification & locations
Identify by its interlocking visible crystals and lack of foliation. Commonly found in batholiths and mountain ranges. Collectors should look for unique mineral inclusions or large phenocrysts.
