igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-pink with speckles of black and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) featuring visible crystals of potassium feldspar, quartz, and mica; Cleavage: None (fractures irregularly); Specific gravity: 2.63 to 2.75.
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish-pink with speckles of black and white
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-pink with speckles of black and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) featuring visible crystals of potassium feldspar, quartz, and mica; Cleavage: None (fractures irregularly); Specific gravity: 2.63 to 2.75.
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface. The pink color is primarily due to an abundance of potassium feldspar (orthoclase). These rocks are typically from the Precambrian to Cenozoic eras, often found in continental crust and mountain belts.
Uses & applications
Used extensively in construction for countertops, floor tiles, and monuments. Also used as crushed stone in roadbeds and aggregates. While not a gemstone, it is popular among rockhounds and for garden landscaping.
Geological facts
Granite makes up a large portion of the Earth's continental crust. The distinctive pink color of this specimen suggests a high concentration of orthoclase feldspar. Famous monuments like the base of the Statue of Liberty are made of granite.
Field identification & locations
Identify in the field by its speckled 'salt and pepper' look with pink hues and its extreme hardness (it will scratch glass). Commonly found in glacial till, riverbeds, and mountainous regions like the Appalachians or the Rockies.
