igneous
Granite Pebble
Intrusive Igneous Rock
Hardness of 6-7 on the Mohs scale, speckled grey and white color, dull to sub-vitreous luster, phaneritic (coarse-grained) crystal structure, specific gravity around 2.65-2.75.
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Physical properties
Hardness of 6-7 on the Mohs scale, speckled grey and white color, dull to sub-vitreous luster, phaneritic (coarse-grained) crystal structure, specific gravity around 2.65-2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica and alkali feldspar deep beneath the Earth's surface over millions of years, later weathered and rounded by water transport.
Uses & applications
Used in landscaping, decorative stone, construction aggregate, and as a natural polished pocket specimen for collectors.
Geological facts
Granite is the most common intrusive rock in the Earth's continental crust and is famous for its durability and resistance to weathering.
Field identification & locations
Easily identified by its characteristic salt-and-pepper speckled appearance containing quartz, feldspar, and mica crystals. Found worldwide in riverbeds, beaches, and glacial outwash.
