Granite

Physical Properties

Hardness: 6-7, Color: variable (pink, white, gray, black), Luster: dull to glassy, Crystal structure: phaneritic (large crystals), Cleavage: none (fractures irregularly)

Formation & Geological History

Formed from slow cooling of magma deep underground (intrusive igneous).

Uses & Applications

Common building material, countertops, monuments, landscaping.

Geological Facts

Granite makes up the core of many mountain ranges and is a major component of the continental crust.

Field Identification & Locations

Identify by its coarse-grained texture and mix of light (quartz, feldspar) and dark (biotite, hornblende) minerals. Widely found globally.

Identified on: 4/25/2026

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