Pink Granite

Physical Properties

Hardness: 6-7 (Mohs); Color: Pink, salmon, or reddish with flecks of gray and black; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained); Cleavage: Feldspar in two directions at 90 degrees; Specific Gravity: 2.63 to 2.75

Formation & Geological History

Formed by the slow cooling of silica-rich magma deep underground (plutonic). The pink hue comes from an abundance of potassium feldspar (orthoclase). These can range in age from billions of years (Precambrian) to more recent tectonic events.

Uses & Applications

Used extensively in construction for countertops, floor tiles, and grave markers; crushed for road base; and popular among beginning collectors for its durability and color.

Geological Facts

Granite makes up a large portion of the Earth's continental crust. The pink color specifically signals that the original magma was rich in potassium rather than sodium or calcium.

Field Identification & Locations

Identify in the field by its 'salt and pepper' appearance combined with pinkish tones and visible interlocking crystals. It will scratch steel and glass. Found commonly in mountainous regions and glacial till.

Identified on: 4/29/2026

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