igneous
Granite
Granite
Hardness: 6-7 (Mohs scale), Color: light-colored (white, gray, or pink) with dark specks, Luster: dull to shiny (when polished), Crystal structure: coarse-grained, Cleavage: poor, Specific gravity: 2.65-2.75
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Physical properties
Hardness: 6-7 (Mohs scale), Color: light-colored (white, gray, or pink) with dark specks, Luster: dull to shiny (when polished), Crystal structure: coarse-grained, Cleavage: poor, Specific gravity: 2.65-2.75
Formation & geological history
Formed from the slow cooling of magma deep underground. Can be found worldwide in continental crust.
Uses & applications
Widely used in construction, flooring, countertops, monuments, and as crushed stone. Also tumbled for decorative purposes.
Geological facts
Granite is one of the most common rocks on the earth's surface and makes up a significant portion of the continental crust.
Field identification & locations
Can be identified by its distinctive speckled appearance and coarse-grained texture. Commonly found in mountainous regions or as river rocks (tumbled and smoothed like the one in the image).
