igneous
Granite Pebble
Intrusive Igneous Rock
Hardness of 6-7 on the Mohs scale, composed primarily of quartz, feldspar, and mica. Shows a phaneritic (coarse-grained) texture with pinkish-red orthoclase feldspar and white/clear quartz grains. Luster is vitreous to dull, specific gravity is approximately 2.65-2.75.
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Physical properties
Hardness of 6-7 on the Mohs scale, composed primarily of quartz, feldspar, and mica. Shows a phaneritic (coarse-grained) texture with pinkish-red orthoclase feldspar and white/clear quartz grains. Luster is vitreous to dull, specific gravity is approximately 2.65-2.75.
Formation & geological history
Formed from the slow cooling and crystallization of magma beneath the Earth's surface over millions of years, often dating from the Precambrian to Cenozoic eras.
Uses & applications
Commonly used in construction, monument building, countertops, and as a decorative stone or landscape aggregate.
Geological facts
Granite is the most common rock of the Earth's continental crust and forms the core of many major mountain ranges.
Field identification & locations
Easily identified by its speckled pink, white, and grey interlocking mineral crystals. Found globally in glacial drift, riverbeds, and mountainous regions.
