Pink Granite

Physical Properties

Hardness: 6–7 Mohs; Color: Pink, reddish-pink, with gray and black specks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Two directions in feldspar grains; Specific gravity: 2.63 to 2.75.

Formation & Geological History

Formed through the slow crystallization of magma below the Earth's surface. The distinct pink color is due to the high concentration of Potassium Feldspar (Orthoclase). Can range from Precambrian to Cenozoic age.

Uses & Applications

Used widely in construction for countertops, floor tiles, paving stones, monuments, and as crushed stone for road base.

Geological Facts

Granite makes up a large portion of the Earth's continental crust. Mount Rushmore is carved into a granite batholith, and pink granite is the state rock of Texas.

Field Identification & Locations

Identify in the field by its coarse, interlocking crystalline texture and visible grains of pink feldspar, clear quartz, and dark mica/biotite. Commonly found in mountainous regions or shield areas like the Canadian Shield or Llano Uplift.

Identified on: 4/21/2026

Mode: Standard