igneous
Pink Granite
Phaneritic Plutonic Igneous Rock (Granite)
Hardness: 6-7 Mohs; Color: Pink, white, and black mottled; Luster: Dull (weathered) to vitreous (on fresh surfaces); Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions for feldspar.
- Hardness
- 6-7 Mohs
- Color
- Pink, white, and black mottled
- Luster
- Dull (weathered) to vitreous (on fresh surfaces)
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, white, and black mottled; Luster: Dull (weathered) to vitreous (on fresh surfaces); Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions for feldspar.
Formation & geological history
Formed from the slow cooling of silica-rich magma deep beneath the Earth's surface during the Precambrian or subsequent eras. This specific specimen has been shaped and rounded by water or glacial erosion.
Uses & applications
Used widely in construction (countertops, tiles), as crushed stone for roads, and as decorative landscaping or river rocks.
Geological facts
The pink color comes from potassium feldspar (orthoclase). Granite is one of the oldest and most abundant rocks on Earth's continental crust.
Field identification & locations
Identify by its 'salt and pepper' look with pink tones. Found globally in continental shields and mountain ranges. This smooth cobble is common near riverbeds or glacial deposits.
