igneous
Crushed Granite / Landscaping Gravel
Granitoid
Hardness of 6-7 on the Mohs scale, predominantly composed of quartz, alkali feldspar, and plagioclase. Colors range from light gray to pinkish-brown depending on the feldspar content. Has a granular, phaneritic crystal structure and dull to vitreous luster.
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Physical properties
Hardness of 6-7 on the Mohs scale, predominantly composed of quartz, alkali feldspar, and plagioclase. Colors range from light gray to pinkish-brown depending on the feldspar content. Has a granular, phaneritic crystal structure and dull to vitreous luster.
Formation & geological history
Formed from the slow crystallization of magma deep beneath the Earth's continental crust over millions of years, later quarried and crushed for commercial use.
Uses & applications
Widely used in construction, landscaping, as a base material for roads, and decorative aggregate.
Geological facts
Granite is the most common igneous rock in the Earth's continental crust and is exceptionally durable against weathering.
Field identification & locations
Easily identified by its speckled appearance showing interlocking crystals of quartz and feldspar; commonly found globally in continental shields and mountain ranges.
