igneous

Pink Granite

Phaneritic Quartz-Feldspar Granite

Hardness: 6-7 on Mohs scale; Color: Pink, salmon, or reddish-brown due to potassium feldspar; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in feldspar grains; Specific gravity: 2.63 to 2.75.

Hardness: 6-7 on Mohs scale
Color: Pink, salmon, or reddish-brown due to potassium feldspar
Luster: Vitreous to dull

Identified May 16, 2026More igneous →

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Physical properties

Formation & geological history

Formed by the slow cooling and crystallization of molten magma deep beneath the Earth's surface (intrusive). The pink color reflects a high concentration of orthoclase feldspar. Geological ages can vary from billions to millions of years.

Uses & applications

Extensively used as a building material, kitchen countertops, flooring, monuments, and decorative gravel. Polished specimens are popular for geological collections.

Geological facts

Granite makes up a large portion of the Earth's continental crust. Its name comes from the Latin 'granum', meaning a grain, in reference to its coarse-grained structure. Mount Rushmore is carved into a granite batholith.

Field identification & locations

Identified in the field by its speckled 'salt and pepper' appearance with pinkish hues. Look for interlocking crystals of translucent quartz, pink feldspar, and dark specks of mica or amphibole. Common in glacial till and mountainous regions.

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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