igneous
Pink Granite
Granite (Phaneritic igneous rock rich in Alkali Feldspar)
Hardness: 6-7 on Mohs scale; Color: Pinkish-red due to high Orthoclase feldspar content, with black biotite and grey quartz specks; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Luster
- Dull to vitreous
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Physical properties
Hardness: 6-7 on Mohs scale; Color: Pinkish-red due to high Orthoclase feldspar content, with black biotite and grey quartz specks; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained); Specific Gravity: 2.63-2.75
Formation & geological history
Formed from the slow cooling and crystallization of magma deep beneath the Earth's surface (intrusive). Most granite massifs are from the Phanerozoic or Precambrian eras.
Uses & applications
Extensively used in construction, countertops, monuments, curbing, and as decorative stone in architecture. Also used for high-end landscaping and as a base for infrastructure.
Geological facts
Granite makes up a large part of the continental crust. It is one of the hardest natural stones available, and the famous 'Rock of Gibraltar' is actually a massive limestone, but many other famous monoliths like El Capitan are granitic.
Field identification & locations
Identify by its interlocking crystalline grains of at least two different minerals (usually pink/white and black). It is found in continental shields and mountain ranges globally. Collectors should look for large, well-defined crystals.
