igneous
Crushed Granite Gravel
Granite (Plagioclase feldspar, Quartz, Alkali feldspar, Biotite)
Hardness: 6-7 on Mohs scale; Color: Varies from pink, white, grey to tan with dark mineral flecks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained, visible interlocking crystals); Specific Gravity: 2.65 - 2.75
- Hardness
- 6-7 on Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Varies from pink, white, grey to tan with dark mineral flecks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained, visible interlocking crystals); Specific Gravity: 2.65 - 2.75
Formation & geological history
Formed from the slow crystallization of magma beneath the Earth's surface over millions of years, commonly associated with continental crust and mountain-building events.
Uses & applications
Widely used in construction for road base, gravel driveways, concrete aggregate, landscaping, and railway ballast.
Geological facts
Granite is the most common intrusive igneous rock on Earth and forms the core of many major mountain ranges. It is extremely durable and resistant to weathering.
Field identification & locations
Easily identified by its speckled appearance with interlocking crystals of quartz, feldspar, and dark micas. Found globally in continental shields and intrusive plutons.
