igneous
Pink Granite
Phaneritic Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)
Hardness: 6-7 Mohs; Color: Pink, reddish-brown, gray, white, and black specs; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible coarse grains); Cleavage: Distinct in feldspars, none in quartz; Specific Gravity: 2.63 - 2.75
- Hardness
- 6-7 Mohs
- Color
- Pink, reddish-brown, gray, white, and black specs
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 Mohs; Color: Pink, reddish-brown, gray, white, and black specs; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible coarse grains); Cleavage: Distinct in feldspars, none in quartz; Specific Gravity: 2.63 - 2.75
Formation & geological history
Formed through the slow crystallization of silica-rich magma deep beneath the Earth's surface (plutonic). Found in continental crust, often appearing in mountain roots or ancient shields formed during the Precambrian to Cenozoic eras.
Uses & applications
Extensively used in construction as dimension stone, countertops, floor tiles, and curbing. Also used in monuments, sculptures, and as crushed stone for road bases and railway ballast.
Geological facts
The pink color is specifically caused by an abundance of potassium feldspar (orthoclase). Granite is the world's toughest dimensional stone and has been used since ancient Egypt to build pyramids and obelisks.
Field identification & locations
Identify by its interlocking 'salt and pepper' crystalline texture and pink/salmon hue. Found globally in mountainous regions and shield areas like the Canadian Shield or the Scottish Highlands. Collectors look for unique large crystalline structures (pegmatites).
