Pink Granite

Physical Properties

Hardness: 6-7 Mohs; Color: Pink, reddish-pink with speckles of grey and black; Luster: Dull to vitreous; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: None (fractures); Specific Gravity: 2.63 to 2.75

Formation & Geological History

Formed through the slow crystallization of magma below Earth's surface (intrusive). The pink color is derived from an abundance of potassium feldspar (orthoclase). Found in continental crust and mountain belts worldwide.

Uses & Applications

Used extensively in construction for countertops, floor tiles, paving stone, monuments, and as crushed decorative gravel.

Geological Facts

Granite is one of the oldest known rocks, with some continental crust specimens dating back billions of years. It is incredibly durable and resistant to weathering, which is why it is used for monuments like Mount Rushmore.

Field Identification & Locations

Identify in the field by its coarse, interlocking mineral grains and speckled pink/white/grey appearance. It will easily scratch glass but cannot be scratched by a steel nail. Common in mountainous regions and glacial till.

Identified on: 5/5/2026

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