Pink Granite

Physical Properties

Hardness: 6-7 Mohs; Color: Pink, reddish-orange with grey and black inclusions; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained visible crystals); Composition: Primarily Potassium Feldspar (Orthoclase), Quartz, and Plagioclase, with traces of Biotite or Hornblende.

Formation & Geological History

Formed from the slow cooling and crystallization of molten magma deep beneath the Earth's surface (intrusive). The high concentration of Potassium Feldspar provides the pinkish hue. Geological ages vary from Precambrian to Cenozoic depending on location.

Uses & Applications

Widely used in construction for countertops, floor tiles, and monuments. It is also used as crushed stone for road base and in architectural landscaping.

Geological Facts

Pink granite is the state rock of New Hampshire (The Granite State) and was the primary material for the 'Old Man of the Mountain'. The pink color specifically comes from an abundance of K-feldspar within the mineral matrix.

Field Identification & Locations

Identify in the field by its interlocking 'salt and pepper' crystalline texture mixed with distinct pink or salmon colors. It will scratch glass easily. Commonly found in batholiths and continental crustal shields.

Identified on: 4/24/2026

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