igneous
Granite
Granite (composed primarily of Quartz, Potassium Feldspar, Plagioclase, and Biotite/Amphibole)
AI-generated identification · may be incorrectHardness: 6-7 on the Mohs scale. Color: Mottled pink, white, translucent gray, and dark brown/black flecks. Luster: Vitreous to dull (wet surface enhances shine). Texture: Medium to coarse-grained phaneritic texture with interlocking crystals.
- Hardness
- 6-7 on the Mohs scale
- Luster
- Vitreous to dull (wet surface enhances shine)
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Physical properties
Hardness: 6-7 on the Mohs scale. Color: Mottled pink, white, translucent gray, and dark brown/black flecks. Luster: Vitreous to dull (wet surface enhances shine). Texture: Medium to coarse-grained phaneritic texture with interlocking crystals.
Formation & geological history
Formed through the slow crystallization and cooling of silica-rich magma deep underground (plutonic environment) beneath continental crust over millions of years.
Uses & applications
Extensively used as dimension stone in construction, building facades, kitchen countertops, paving blocks, monuments, and crushed stone aggregate.
Geological facts
Granite makes up a major portion of the Earth's continental crust. The pinkish color in this specimen comes from orthoclase (potassium feldspar), while translucent areas are quartz.
Field identification & locations
Identified by its visible, interlocking mineral grains of quartz (glassy gray), feldspar (pinkish/white), and mafic minerals (black flecks). Commonly found in continental interiors, mountain ranges, and eroded plutons worldwide.
