igneous

Granite (Pink/Potassium-rich)

Pink Granite (contains K-Feldspar, Quartz, and Plagioclase)

Hardness: 6-7 on Mohs scale. Color: Pink to reddish with white and grey grains. Luster: Vitreous to dull. Crystal structure: Phaneritic (coarse-grained). Cleavage: Two directions (in feldspars). Specific gravity: 2.6-2.7.

Hardness: 6-7 on Mohs scale
Color: Pink to reddish with white and grey grains
Luster: Vitreous to dull

Identified April 10, 2026More igneous →

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Physical properties

Formation & geological history

Formed through the slow crystallization of magma below Earth's surface (intrusive). Typically formed in continental crust during orogenic (mountain-building) events across various geological eras ranging from the Precambrian to Cenozoic.

Uses & applications

Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments due to its durability and aesthetic appeal.

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 and is one of the most recognizable rocks on the planet.

Field identification & locations

Identify in the field by its coarse, interlocking crystalline texture where individual minerals are visible. Look for the distinct pinkish hue indicating high orthoclase content. It is found in mountain ranges and shield areas worldwide.

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