igneous
Pink Granite
Phaneritic Felsic Igneous Rock
Hardness: 6-7 Mohs; Color: Pink, white, and grey speckled; Luster: Dull (weathered) to vitreous (crystals); Structure: Phaneritic (coarse-grained) crystalline; Cleavage: None (individual minerals have cleavage); Specific Gravity: 2.63 to 2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, white, and grey speckled
- Luster
- Dull (weathered) to vitreous (crystals)
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, white, and grey speckled; Luster: Dull (weathered) to vitreous (crystals); Structure: Phaneritic (coarse-grained) crystalline; Cleavage: None (individual minerals have cleavage); Specific Gravity: 2.63 to 2.75
Formation & geological history
Formed from the slow cooling of silica-rich magma deep underground (plutonic). The pink color comes from potassium feldspar (orthoclase). This specimen appears water-worn, likely from a river or glacial deposit.
Uses & applications
Used in construction, countertops, monuments, and as decorative landscaping stones. In cobble form, it is used for paving or garden features.
Geological facts
Granite makes up a large portion of the Earth's continental crust. The pink hue specifically indicates a high concentration of K-feldspar. It is one of the hardest and most durable common rocks.
Field identification & locations
Identified by its 'salt and pepper' look with distinct pink crystals. Look for interlocking mineral grains of quartz (glassy), feldspar (pink/white), and mica (dark specks). Found globally in continental shields.
