igneous
Pink Granite
Phaneritic Igneous Rock (Quartz-Feldspar dominant)
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-orange, with gray and black specks; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63 - 2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, reddish-orange, with gray and black specks
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, reddish-orange, with gray and black specks; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63 - 2.75
Formation & geological history
Formed by the slow crystallization of magma below Earth's surface. The pink color comes from a high concentration of potassium feldspar (orthoclase). These rockers can be hundreds of millions to billions of years old.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, and monuments due to its durability and aesthetic appeal. Small tumbled pieces are common in rock collections.
Geological facts
Granite makes up a large portion of the Earth's continental crust. The pink hue specifically indicates it is high in alkali feldspar rather than plagioclase.
Field identification & locations
Identify in the field by its interlocking crystalline texture and lack of layering. It is commonly found in mountain ranges, glacial till, and riverbeds in areas with exposed batholiths.
