igneous
Pink Granite
Phaneritic Plutonic Felsic Rock (Granite)
Hardness: 6-7 on Mohs scale; Color: Pink, grey, and black mottled; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible crystals of quartz, feldspar, and biotite/hornblende); Specific Gravity: 2.63 to 2.75
- Hardness
- 6-7 on Mohs scale
- Color
- Pink, grey, and black mottled
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pink, grey, and black mottled; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible crystals of quartz, feldspar, and biotite/hornblende); Specific Gravity: 2.63 to 2.75
Formation & geological history
Formed through the slow cooling and crystallization of molten magma deep beneath the Earth's surface (plutonic) during orogenic events. Most granite formations range from the Precambrian through the Cenozoic era.
Uses & applications
Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments. Also used as crushed stone in roadbeds and concrete.
Geological facts
The pink color in this granite is caused by an abundance of potassium feldspar (orthoclase). Granite makes up a significant portion of the Earth's continental crust and is unique to our planet in our solar system.
Field identification & locations
Identify by its interlocking crystalline texture of light and dark minerals and its high hardness (it will scratch glass). Commonly found in continental shields, mountain ranges, and as glacial erratic on beaches as seen here.
