igneous
Feldspar-rich Granite (Pink Granite)
Granite (Orthoclase rich)
Hardness: 6-7 (Mohs scale); Color: Pinkish-orange (due to potassium feldspar) with white quartz and dark specks; Luster: Vitreous to dull; Structure: Phaneritic (medium-grained crystalline); Cleavage: Perfect in two directions for feldspar components.
- Hardness
- 6-7 (Mohs scale)
- Luster
- Vitreous to dull
Identified More igneous →
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Physical properties
Hardness: 6-7 (Mohs scale); Color: Pinkish-orange (due to potassium feldspar) with white quartz and dark specks; Luster: Vitreous to dull; Structure: Phaneritic (medium-grained crystalline); Cleavage: Perfect in two directions for feldspar components.
Formation & geological history
Formed by the slow crystallization of magma below the Earth's surface (intrusive). The orange-pink color indicates a high concentration of orthoclase feldspar. Such rocks provide evidence of ancient continental crust formation.
Uses & applications
Large-scale use in construction (countertops, monuments, building stone) and as decorative gravel. Small river-worn specimens are used in landscaping or student collections.
Geological facts
Granite is the most common igneous rock found at Earth's surface and makes up the bulk of the continental crust. This specific specimen appears to be a stream-tumbled pebble with weathered surfaces.
Field identification & locations
Identify by its salt-and-pepper appearance and hardness (it will scratch glass). Common in mountainous regions and glacial till across North America and Europe.
