Granite

Physical Properties

Hardness: 6-7 (Mohs scale), Color: Mottled grey, white, and pinkish-tan, Luster: Dull to vitreous, Crystal structure: Phaneritic (coarse-grained), Cleavage: None (fractures), Specific gravity: 2.63-2.75

Formation & Geological History

Formed through the slow crystallization of magma below Earth's surface. It can date back billions of years and is found in the deep roots of mountain ranges or continental crust.

Uses & Applications

Extensively used in construction for countertops, floor tiles, paving stone, monuments, and as aggregate in concrete.

Geological Facts

Granite makes up the majority of the Earth's continental crust. It is one of the hardest and most durable rocks available for human use.

Field Identification & Locations

Identify by its interlocking 'salt and pepper' appearance of quartz and feldspar crystals. It is found globally in mountainous regions and shield areas like the Canadian Shield.

Identified on: 5/4/2026

Mode: Standard