Granite (Kitchen Countertop)

Physical Properties

Hardness: 6-7 (Mohs scale); Color: Variegated brown, tan, and black; Luster: Vitreous when polished; Crystal structure: Phaneritic (coarse-grained); Composition: Quartz, alkali feldspar, and plagioclase with minor mica.

Formation & Geological History

Formed from the slow crystallization of magma below Earth's surface. These rocks are typically hundreds of millions of years old (Precambrian to Cenozoic).

Uses & Applications

Predominantly used for construction, high-end kitchen countertops, architectural flooring, and memorial monuments due to its durability.

Geological Facts

Granite is the most common igneous rock found on Earth's continents and makes up much of the continental crust. Many famous peaks, such as those in Yosemite National Park, are composed of granite.

Field Identification & Locations

Identify by its interlocking granular texture and presence of translucent quartz crystals combined with opaque feldspars. It is found in large plutonic masses globally.

Identified on: 4/25/2026

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