igneous

Pink Granite

Phaneritic Quartz-Feldspar Plutonic Rock

Hardness: 6-7 on Mohs scale. Color: Pinkish-orange to light red due to K-feldspar, mixed with white/gray quartz and black biotite. Luster: Vitreous to dull. Crystal structure: Phaneritic (visible crystals).

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

Identified May 16, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow subterranean cooling of silica-rich magma (plutonic) within the Earth's crust, often during orogenic (mountain building) events.

Uses & applications

Extensively used in construction for countertops, floor tiles, paving stones, monuments, and as crushed stone for road base.

Geological facts

Granite makes up a large portion of the Earth's continental crust. Mount Rushmore is carved into a massive granite batholith. Its resistance to acid and wear makes it a premier kitchen surface.

Field identification & locations

Identified by its 'salt and pepper' appearance with distinct pinkish tones. Look for interlocking crystals of quartz and feldspar that are large enough to see with the naked eye.

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

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Blue Apatite

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

mineral

Magnetite

Magnetite (Fe3O4)

mineral