igneous
Granite fragment
Granite
Hardness: 6-7 (Mohs scale), Color: pinkish-gray with dark flecks, Luster: Vitreous to dull, Crystal structure: Phaneritic (coarsegrained), Cleavage: None (fractures), Specific gravity: 2.65-2.75
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Physical properties
Hardness: 6-7 (Mohs scale), Color: pinkish-gray with dark flecks, Luster: Vitreous to dull, Crystal structure: Phaneritic (coarsegrained), Cleavage: None (fractures), Specific gravity: 2.65-2.75
Formation & geological history
Formed from the slow crystallization of magma below Earth's surface. Primarily found in continental crust and can be billions of years old.
Uses & applications
Commonly used in construction, countertops, monuments, and as crushed stone for road base.
Geological facts
Granite is the most common igneous rock found on Earth's continents and makes up the core of many mountain ranges.
Field identification & locations
Identify by its interlocking crystalline texture containing quartz, feldspar, and mica. Commonly found in mountainous regions or as landscaping gravel.
