igneous
Pink Granite
Granite (Felsic Plutonic Rock)
Hardness: 6-7 Mohs; Color: Pink, white, and grey with black specks; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: None (grains have cleavage, rock does not); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, white, and grey with black specks
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, white, and grey with black specks; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: None (grains have cleavage, rock does not); Specific Gravity: 2.63-2.75
Formation & geological history
Formed by the slow crystallization of silica-rich magma beneath the Earth's surface. It is often found in continental crustal plates and dates back to various tectonic events from the Archean to the Cenozoic eras.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, and monuments due to its durability. Smaller tumbled pieces are used for landscaping or decorative gravel.
Geological facts
Granite makes up a large part of the Earth's continental crust. The pink color is specifically caused by an abundance of potassium feldspar (orthoclase).
Field identification & locations
Identify by its 'salt and pepper' look with visible crystals of quartz, feldspar, and mica. Commonly found in mountainous regions or glacial till. Collectors look for unique vein patterns or large crystal inclusions.
