Granite

Physical Properties

Hardness: 6-7 Mohs; Color: Pink, gray, or white with darker minerals; Luster: Dull to phaneritic (visible crystals); Structure: Granular/Crystalline; Specific Gravity: 2.63-2.75

Formation & Geological History

Formed through the slow crystallization of magma below Earth's surface. Found in continental crust, often appearing in mountain ranges or cratons, spanning all geological eras.

Uses & Applications

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

Geological Facts

Granite makes up a large portion of the Earth's continental crust. It is extremely durable and has been used for famous structures like the Great Pyramids and Mount Rushmore.

Field Identification & Locations

Identify by its 'salt and pepper' appearance with large, visible crystals of quartz (clear/gray), feldspar (pink/white), and mica (black/shiny). Extremely common worldwide.

Identified on: 4/13/2026

Mode: Standard