igneous

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)

Hardness: 6-7 Mohs; Color: Pink, reddish-orange, white, and black speckled; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions in feldspar grains.

Hardness: 6-7 Mohs
Color: Pink, reddish-orange, white, and black speckled
Luster: Vitreous to dull

Identified February 24, 2026More igneous →

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Physical properties

Hardness: 6-7 Mohs; Color: Pink, reddish-orange, white, and black speckled; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained) crystalline; Cleavage: Two directions in feldspar grains.

Formation & geological history

Formed by the slow cooling of silica-rich magma deep beneath the Earth's surface (plutonic). This specimen typically dates from the Precambrian to Cenozoic eras depending on the specific batholith origin.

Uses & applications

Extensively used in construction for countertops, floor tiles, paving stones, and monuments. It is also used as crushed stone for road base and railroad ballast.

Geological facts

The pink color is specifically due to a high concentration of potassium feldspar (orthoclase). Granite makes up much of the Earth's continental crust and is incredibly resistant to weathering.

Field identification & locations

Identify in the field by its interlocking coarse crystals and distinctive pink/salmon hue mixed with clear quartz and dark biotite or hornblende. Commonly found in mountain ranges and continental shields like the Llano Uplift or the Canadian Shield.

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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