igneous
Granite Cobble
Intrusive Igneous Rock
AI-generated identification · may be incorrectHardness 6-7 on Mohs scale, grayish-brown mottled color, dull to sub-crystalline luster, phaneritic texture with visible quartz, feldspar, and mica grains.
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Physical properties
Hardness 6-7 on Mohs scale, grayish-brown mottled color, dull to sub-crystalline luster, phaneritic texture with visible quartz, feldspar, and mica grains.
Formation & geological history
Formed from the slow cooling and crystallization of magma deep beneath the Earth's crust over millions of years.
Uses & applications
Commonly used in construction, landscaping, road aggregates, and as raw material for dimension stone.
Geological facts
Granite is a primary component of continental crust and is one of the most durable natural building stones available.
Field identification & locations
Easily identified in the field by its interlocking crystalline mineral grains and weathered, rounded river-stone shape. Found globally in mountainous regions and glacial drift.
