igneous
Granite (Weathered)
Granitic intrusive rock
Hardness: 6-7 on Mohs scale; Color: typically mottled grey, white, and pinkish-brown (weathered); Luster: Vitreous to dull; Crystal structure: Phaneritic (visible interlocking grains); Specific Gravity: 2.63-2.75
- Hardness
- 6-7 on Mohs scale
- Color
- typically mottled grey, white, and pinkish-brown (weathered)
- Luster
- Vitreous to dull
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Physical properties
Hardness: 6-7 on Mohs scale; Color: typically mottled grey, white, and pinkish-brown (weathered); Luster: Vitreous to dull; Crystal structure: Phaneritic (visible interlocking grains); Specific Gravity: 2.63-2.75
Formation & geological history
Formed from the slow cooling of silica-rich magma deep underground (intrusive). The weathering suggests this specimen was exposed to elements, likely from the Phanerozoic eon.
Uses & applications
Used extensively in construction for countertops, flooring, monuments, and as crushed stone for road base.
Geological facts
Granite makes up a large portion of the Earth's continental crust. It is extremely durable and has been used since ancient Egypt for building pyramids and obelisks.
Field identification & locations
Identify by its interlocking crystalline texture containing quartz (glassy), feldspar (opaque/colored), and mica (shiny flakes). Found in large batholiths or as erratic boulders in glacial areas.
