igneous

Pink Granite

Phaneritic intrusive felsic igneous rock

Hardness: 6-7 (Mohs scale); Color: Pink to reddish-orange with white, gray, and black specks; Luster: Dull to vitreous; Crystal structure: Phaneritic (visible crystals); Cleavage: Poor, fractures irregularly; Specific gravity: 2.63-2.75

Hardness: 6-7 (Mohs scale)
Color: Pink to reddish-orange with white, gray, and black specks
Luster: Dull to vitreous

Identified February 24, 2026More igneous →

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Physical properties

Formation & geological history

Formed by the slow crystallization of magma below Earth's surface. High concentrations of potassium feldspar (orthoclase) give it the characteristic pink color. These formations can range from billions of years old (Precambrian) to more recent eras.

Uses & applications

Extensively used in construction for countertops, floor tiles, and monuments. Also used in crushed form as road base and railway ballast. Polished specimens are popular in interior design.

Geological facts

Granite makes up a large portion of the Earth's continental crust. Famous peaks like Yosemite's Half Dome are comprised of granite. The pink hue is specifically caused by the presence of orthoclase feldspar.

Field identification & locations

Identify in the field by its speckled, interlocking crystalline texture and pinkish-orange hue. It will scratch glass but cannot be scratched by a steel nail. Commonly found in batholiths and mountainous regions worldwide.

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Fluorapatite (Ca5(PO4)3F)

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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)

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Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

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Blue Apatite

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

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Magnetite

Magnetite (Fe3O4)

mineral