igneous

Granite (Pink/Red)

Phaneritic Plutonic Felsic Rock (major minerals: Quartz, Orthoclase Feldspar, Plagioclase Feldspar)

Hardness: 6-7 on Mohs scale; Color: Mottled pink, red, white, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained visible crystals); Cleavage: Perfect in two directions for feldspar components.

Hardness: 6-7 on Mohs scale
Color: Mottled pink, red, white, and black
Luster: Vitreous to dull

Identified May 3, 2026More igneous →

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Physical properties

Formation & geological history

Formed by the slow crystallization of magma below Earth's surface. The pink or red hue is caused by an abundance of potassium feldspar (orthoclase). These intrusive formations can be hundreds of millions of years old.

Uses & applications

Widely used in construction for countertops, floor tiles, paving stones, and monuments due to its durability and aesthetics.

Geological facts

Granite is the most common igneous rock found on Earth's continents. The red color in this specific specimen is often a result of trace amounts of hematite or impurities within the feldspar lattice.

Field identification & locations

Identify in the field by looking for a 'salt and pepper' or multicrystalline appearance where individual mineral grains are visible to the naked eye. Commonly found in mountain ranges and glacial deposits (riverbed stones).

Other igneous specimens

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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