igneous
Granite
Granite
Hardness: 6-7 on Mohs scale; Color: Pink, gray, white with black specks; Luster: Phaneritic (crystalline); Structure: Massive/Granular; Cleavage: None (fractures); Specific Gravity: 2.65-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, gray, white with black specks
- Luster
- Phaneritic (crystalline)
Identified More igneous →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, gray, white with black specks; Luster: Phaneritic (crystalline); Structure: Massive/Granular; Cleavage: None (fractures); Specific Gravity: 2.65-2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. It is a plutonic rock found in continental crust and mountain ranges, often dating back hundreds of millions to billions of years.
Uses & applications
Extensively used in construction, architectural facades, kitchen countertops (as seen in the image), monuments, and paving stones.
Geological facts
Granite is the most common igneous rock found on Earth's continents. The iconic peaks of Yosemite National Park are largely composed of granite batholiths.
Field identification & locations
Identify by its coarse-grained texture and visible crystals of quartz, feldspar, and mica. Found in areas with continental bedrock or in quarries worldwide.
More like this
Other igneous specimens
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Dark Igneous Rock (Likely Basalt or Diabase)
Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.
Igneous
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Sodalite
Sodalite - Na8(Al6Si6O24)Cl2
mineral
Blue Apatite
Apatite (Group), Ca5(PO4)3(F,Cl,OH)
mineral
Magnetite
Magnetite (Fe3O4)
mineral