igneous
Granite Cobble
Intrusive Igneous Rock
AI-generated identification · may be incorrectHardness of 6 on Mohs scale, mottled gray and brown color, dull luster, coarse-grained phaneritic crystal structure, no distinct cleavage, specific gravity around 2.65.
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Physical properties
Hardness of 6 on Mohs scale, mottled gray and brown color, dull luster, coarse-grained phaneritic crystal structure, no distinct cleavage, specific gravity around 2.65.
Formation & geological history
Formed through the slow cooling of magma beneath the Earth's crust, often dating back hundreds of millions of years.
Uses & applications
Commonly used in construction, road aggregate, and landscaping materials.
Geological facts
Granite is the most common intrusive rock on Earth and forms the core of many major mountain ranges.
Field identification & locations
Easily identified in the field by its interlocking quartz, feldspar, and mica crystals. Found worldwide in continental crustal shields and glacial deposits.
