igneous
Granite Pebble
Intrusive Igneous Rock (Quartz, Feldspar, Mica)
Hardness: 6-7 on the Mohs scale. Color: Mottled grey, pink, brown, and white. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None (fractures unevenly). Specific gravity: 2.65 - 2.75.
- Hardness
- 6-7 on the Mohs scale
- Color
- Mottled grey, pink, brown, and white
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on the Mohs scale. Color: Mottled grey, pink, brown, and white. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained, visible crystals). Cleavage: None (fractures unevenly). Specific gravity: 2.65 - 2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma deep beneath the Earth's surface over millions of years.
Uses & applications
Used in construction, countertops, monuments, landscaping, and as decorative stone.
Geological facts
Granite is the most common igneous rock in the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its speckled appearance showing interlocking crystals of quartz, feldspar, and dark minerals like biotite. Found worldwide in mountainous regions and riverbeds.
