igneous
Granite / Feldspar gravel
Granite (felsic intrusive igneous rock)
Hardness: 6-7 on Mohs scale; Color: pinkish-red, tan, brown, white; Luster: vitreous to dull; Crystal Structure: phaneritic, coarse-grained interlocking crystals
- Hardness
- 6-7 on Mohs scale
- Color
- pinkish-red, tan, brown, white
- Luster
- vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 on Mohs scale; Color: pinkish-red, tan, brown, white; Luster: vitreous to dull; Crystal Structure: phaneritic, coarse-grained interlocking crystals
Formation & geological history
Formed by the slow crystallization of felsic magma deep beneath the Earth's surface during various geological eras.
Uses & applications
Used widely as crushed stone, construction aggregate, landscaping gravel, and decorative rock.
Geological facts
Granite makes up a large portion of Earth's continental crust. These small crushed pieces show pink potassium feldspar and quartz grains mixed with organic soil debris.
Field identification & locations
Look for visible interlocking grains of pink feldspar, clear-grey quartz, and dark mica or amphibole minerals. Found globally in continental igneous terrains.
