igneous
Granitic Gravel
Granite (Quartz, Feldspar, and Mica mixture)
Hardness: 6-7 (Mohs scale), Color: Mottled grey, white, and tan, Luster: Vitreous to dull, Crystal Structure: Phaneritic (coarse-grained)
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Physical properties
Hardness: 6-7 (Mohs scale), Color: Mottled grey, white, and tan, Luster: Vitreous to dull, Crystal Structure: Phaneritic (coarse-grained)
Formation & geological history
Formed from the slow cooling of magma deep beneath the Earth's surface (plutonic). Found in continents globally, often part of ancient shields or mountain belts.
Uses & applications
Commonly used in landscaping, as road base material, concrete aggregate, and in historical or industrial construction.
Geological facts
Granite makes up much of the Earth's continental crust. These specific pieces appear to be weathered clastic debris, likely mechanically broken for utility use.
Field identification & locations
Identify by its multi-colored, crystalline appearance where individual grains of quartz and feldspar are visible. Found in pebble and gravel form near decorative paths or construction sites.
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