igneous

Pink Granite

Felsic Intrusive Igneous Rock (composed primarily of K-Feldspar, Quartz, and Mica)

Hardness: 6-7 on Mohs scale. Color: Salmon pink to reddish-brown with grey and white specks. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained). Cleavage: Perfect in two directions for feldspar components.

Hardness: 6-7 on Mohs scale
Color: Salmon pink to reddish-brown with grey and white specks
Luster: Vitreous to dull

Identified March 7, 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 (plutonic). Typical ages range from Proterozoic to Cenozoic depending on the specific batholith origin.

Uses & applications

Extensively used in construction for countertops, floor tiles, and outdoor monuments. Crushed granite is also used for road base and railroad ballast. Larger pieces are often used in landscaping.

Geological facts

The pink color is caused by an abundance of potassium feldspar (orthoclase). Granite makes up a large portion of the Earth's continental crust. It is often much harder and more durable than marble.

Field identification & locations

Identify by its interlocking 'salt and pepper' texture where crystals are large enough to see with the naked eye. Found worldwide in continental shield areas like the Canadian Shield or the Scottish Highlands. Collectors looking for unique specimens should look for large phenocrysts.

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

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Blue Apatite

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

mineral

Magnetite

Magnetite (Fe3O4)

mineral