igneous
Granite Pebble
Felsic Intrusive Igneous Rock
Hardness: 6-7 (Mohs scale), Color: Mottled white, grey, and black, Luster: Dull to vitreous, Crystal Structure: Phaneritic (visible crystals), Specific Gravity: 2.63 - 2.75
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Mottled white, grey, and black, Luster: Dull to vitreous, Crystal Structure: Phaneritic (visible crystals), Specific Gravity: 2.63 - 2.75
Formation & geological history
Formed through the slow crystallization of magma below Earth's surface. This specific specimen has been rounded and smoothed by water erosion in a river or coastal environment.
Uses & applications
Construction aggregate, architectural stone, landscaping, and as a common educational specimen.
Geological facts
Granite makes up a large portion of the Earth's continental crust. Its durability makes it one of the most popular stones for countertops and monuments worldwide.
Field identification & locations
Identify by its 'salt and pepper' appearance and hardness (it will scratch glass). Common in mountainous regions, riverbeds, and glacial deposits.
