igneous
Granite Pebble
Intrusive Igneous Rock
Hardness of 6 to 7 on the Mohs scale, predominantly grayish-brown with visible mineral grains, dull to vitreous luster, phaneritic crystal structure, specific gravity around 2.65 to 2.75.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, predominantly grayish-brown with visible mineral grains, dull to vitreous luster, phaneritic crystal structure, specific gravity around 2.65 to 2.75.
Formation & geological history
Formed from the slow cooling of magma rich in silica beneath the Earth's surface over millions of years, followed by weathering and water transport into a rounded pebble.
Uses & applications
Used in landscaping, construction aggregate, road base, and decorative stones.
Geological facts
Granite is one of the most common intrusive rocks on Earth and forms the core of many major mountain ranges.
Field identification & locations
Easily identified by its speckled, coarse-grained appearance containing quartz, feldspar, and mica; commonly found in riverbeds and glacial drift.
