igneous
Granite
Felsic intrusive igneous rock
Hardness: 6-7 on Mohs scale. Color: Varies widely (pink, white, gray, black) due to feldspar and quartz content. Luster: Vitreous to dull. Crystal structure: Phanerozoic (coarse-grained, visible crystals). Specific gravity: 2.65 - 2.75.
- Hardness
- 6-7 on Mohs scale
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale. Color: Varies widely (pink, white, gray, black) due to feldspar and quartz content. Luster: Vitreous to dull. Crystal structure: Phanerozoic (coarse-grained, visible crystals). Specific gravity: 2.65 - 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides, trapped beneath the Earth's surface over millions of years.
Uses & applications
Widely used in construction, architectural facades, countertops, monuments, and paving stones.
Geological facts
Granite makes up a major part of the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its speckled, interlocking crystal texture consisting mainly of quartz, feldspar, and micas. Found globally in continental shields and mountain ranges.
