Pink Granite

Physical Properties

Hardness: 6-7 on Mohs scale. Color: Mottled pink, white, and black. Luster: Dull (weathered) to vitreous. Crystal structure: Phaneritic (coarse-grained) featuring orthoclase feldspar, quartz, and minor mica/hornblende. Specific gravity: 2.6-2.7.

Formation & Geological History

Formed from the slow cooling of silica-rich magma deep beneath the Earth's surface (plutonic). This cooling allows for large crystals to grow. Most granites range from 1 billion to 300 million years old.

Uses & Applications

Used extensively in construction for countertops, floor tiles, and monuments. Also used as crushed stone for road bases and infrastructure.

Geological Facts

Granite is the most common igneous rock found in the Earth's continental crust. The pink color specifically comes from a high concentration of Potassium (K) Feldspar, also known as Orthoclase.

Field Identification & Locations

Identify in the field by its 'salt and pepper' or interlocking crystalline texture and its extreme hardness; it will easily scratch copper or steel. Look for the distinct pink or salmon hue of the feldspar grains which distinguishes it from gray granite.

Identified on: 4/23/2026

Mode: Standard