igneous

Pink Granite

Phaneritic intrusive igneous rock (K-feldspar rich)

Hardness: 6-7 on Mohs scale; Color: Pink, salmon, or reddish-orange with white, gray, and black speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63 - 2.75.

Hardness: 6-7 on Mohs scale
Luster: Vitreous to dull

Identified April 5, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow cooling and crystallization of magma deep beneath the Earth's surface. High potassium feldspar content gives it the characteristic pink color. Most granites date back to the Precambrian or Paleozoic eras.

Uses & applications

Extensively used in construction (countertops, floor tiles, monument stone), aggregate for road building, and as ornamental landscaping stone.

Geological facts

Granite makes up a large part of the Earth's continental crust. The pinker the rock, the higher the concentration of orthoclase feldspar it contains compared to other minerals like quartz or biotite.

Field identification & locations

Identify in the field by its interlocking visible crystals (phaneritic texture) and high hardness (will scratch glass). Commonly found in batholiths and mountain ranges like the Rockies or Appalachians.

Other igneous specimens

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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)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

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

mineral

Magnetite

Magnetite (Fe3O4)

mineral