igneous
Pink Granite (Water-Worn)
Felsic Plutonic Rock (Potassium Feldspar-rich)
Hardness: 6-7 Mohs; Color: Pink, orange-red with inclusions of black/grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained crystals); Specific gravity: 2.6-2.7
- Hardness
- 6-7 Mohs
- Color
- Pink, orange-red with inclusions of black/grey
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, orange-red with inclusions of black/grey; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained crystals); Specific gravity: 2.6-2.7
Formation & geological history
Formed through the slow cooling of silica-rich magma deep underground. The specimen shown appears to have been tumbled or water-worn in a river or beach environment, smoothing its sharp edges. Geological age is typically Precambrian to Cenozoic depending on location.
Uses & applications
Used in construction, kitchen countertops, monuments, and as decorative landscaping stones or aquarium gravel.
Geological facts
Pink granite gets its distinctive color from high concentrations of orthoclase feldspar. Mt. Rushmore is carved from a fine-grained granite, and it is the state rock of New Hampshire.
Field identification & locations
Identify by its 'salt and pepper' appearance with prominent pink/flesh-toned crystals. It is found in continental crust worldwide, particularly in mountains and glacial deposits. Collectors value large, well-rounded specimens with unique mineral patterns.
