igneous

Pink Granite

Phaneritic Igneous Rock (high K-feldspar content)

Hardness: 6-7 Mohs; Color: Pink, reddish-pink, with gray/white mottled spots; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible interlocking crystals); Cleavage: Perfect in feldspar grains; Specific Gravity: 2.63 - 2.75

Hardness: 6-7 Mohs
Color: Pink, reddish-pink, with gray/white mottled spots
Luster: Dull to vitreous

Identified April 12, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow crystallization of magma below the Earth's surface (intrusive). The pink color is caused by an abundance of potassium feldspar (orthoclase). These formations often date from the Precambrian to Cenozoic eras.

Uses & applications

Used extensively in construction (countertops, flooring, monuments), aggregate in road building, and as ornamental landscaping stone.

Geological facts

Famous structures like the base of the Statue of Liberty and various Egyptian pyramids utilize granite. The pink hue is a definitive indicator of high orthoclase feldspar content compared to gray granites.

Field identification & locations

Identify in the field by its 'salt and pepper' texture with dominant pink grains. It is extremely hard and will scratch glass. Found globally in continental crust and mountain ranges.

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Blue Apatite

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