Pink Granite

Physical Properties

Hardness: 6-7 Mohs; Color: Pink, orange-tan, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (visible crystals); Cleavage: Perfect in two directions for feldspar; Specific Gravity: 2.63-2.75.

Formation & Geological History

Formed from the slow crystallization of magma below Earth's surface. High potassium feldspar content gives it the pink hue. These rocks can range from Precambrian to Cenozoic era environments.

Uses & Applications

Used extensively in construction for countertops, floor tiles, paving stone, curbing, and as a decorative stone in monuments and jewelry (lapidary).

Geological Facts

Granite makes up a large portion of the Earth's continental crust. Mount Rushmore is carved into a granite batholith. It is one of the hardest and most durable natural stones available.

Field Identification & Locations

Identify in the field by its 'salt and pepper' appearance with pinkish hues and visible crystalline structure. Found in mountainous regions, shield areas, and as river-worn pebbles in glacial till.

Identified on: 5/3/2026

Mode: Standard