igneous

Granite

Intrusive Felsic Igneous Rock (primarily Quartz, Feldspar, and Mica)

Hardness: 6-7 (Mohs); Color: Pink, light gray, or white with dark flecks; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarsegrained/visible crystals); Cleavage: Distinct in feldspar grains; Specific gravity: 2.63 to 2.75

Hardness: 6-7 (Mohs)
Color: Pink, light gray, or white with dark flecks
Luster: Vitreous to dull

Identified February 24, 2026More igneous →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed through the slow crystallization of magma below Earth's surface. It is an intrusive plutonic rock found in continental crust across all geological ages, especially in mountain belts and cratons.

Uses & applications

Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.

Geological facts

Granite makes up a large part of the continental crust. The iconic peaks of Yosemite National Park and the faces on Mount Rushmore are carved into granite formations.

Field identification & locations

Identified in the field by its interlocking, 'salt and pepper' crystalline texture where minerals are large enough to see with the naked eye. Commonly found in mountainous regions or areas with exposed continental shields like Canada or Scandinavia.

Other igneous specimens

See all

Blue Apatite

Fluorapatite (Ca5(PO4)3F)

mineral

Dark Igneous Rock (Likely Basalt or Diabase)

Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Magnetite

Magnetite (Fe3O4)

mineral