igneous
Granite
Plutonic Igneous Rock
Hardness of 6-7 on Mohs scale, typically pink, white, gray, or black with a speckled appearance due to interlocking crystals, vitreous to dull luster, specific gravity of 2.65-2.75.
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Physical properties
Hardness of 6-7 on Mohs scale, typically pink, white, gray, or black with a speckled appearance due to interlocking crystals, vitreous to dull luster, specific gravity of 2.65-2.75.
Formation & geological history
Formed from the slow cooling and solidification of magma rich in silica and alkali aluminum silicates deep underground, typically over millions of years.
Uses & applications
Widely used in construction, architectural buildings, countertops, monuments, and paving stones.
Geological facts
Granite is the most common rock of Earth's continental crust and is frequently found in major mountain ranges. The pink color in many granites comes from potassium feldspar.
Field identification & locations
Identified in the field by its distinct interlocking crystalline texture containing visible grains of quartz, feldspar, and micas. Found globally in shield areas and mountain cores.
