igneous
Granite
Phaneritic Igneous Rock (Granite)
Hardness: 6-7 on Mohs scale. Color: Mottled white, pink, and dark grey/brown. Luster: Vitreous to dull. Crystal Structure: Phaneritic (coarse-grained). Specific Gravity: 2.63 to 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Mottled white, pink, and dark grey/brown
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Mottled white, pink, and dark grey/brown. Luster: Vitreous to dull. Crystal Structure: Phaneritic (coarse-grained). Specific Gravity: 2.63 to 2.75.
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface. This process typically occurs within continental crust over millions of years.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, and monuments due to its durability and aesthetic appeal.
Geological facts
Granite is one of the hardest substances in the world; the only thing harder than granite is a diamond. It makes up a large portion of the Earth's continental crust.
Field identification & locations
Identify by its interlocking 'salt and pepper' appearance of quartz, feldspar, and mica. Commonly found in mountainous regions or shield areas. Collectors value it for mineral variety.
