igneous
Granite Pebble
Phaneritic intrusive igneous rock
Hardness of 6 on the Mohs scale, multicolored (typically featuring quartz, feldspar, and biotite mica), dull to sub-vitreous luster, crystalline granular structure, specific gravity around 2.65 to 2.75.
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Physical properties
Hardness of 6 on the Mohs scale, multicolored (typically featuring quartz, feldspar, and biotite mica), dull to sub-vitreous luster, crystalline granular structure, specific gravity around 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali metal oxides beneath the Earth's surface, dating across various geological eras.
Uses & applications
Used in construction, countertops, monuments, landscaping, and aggregate.
Geological facts
Granite is the most common intrusive rock of Earth's continental crust and is exceptionally durable.
Field identification & locations
Identifiable by its distinct speckled appearance consisting of interlocking crystals of quartz, feldspar, and dark minerals; found worldwide in continental shields and mountain ranges.
