igneous

Pink Granite

Phaneritic Acidic Igneous Rock (Rich in K-feldspar)

Hardness: 6-7 (Mohs scale); Color: Pink, reddish, grey, and black mottled; Luster: Glassy to dull; Crystal structure: Phaneritic (coarse crystals visible); Specific Gravity: 2.63 - 2.75

Hardness: 6-7 (Mohs scale)
Color: Pink, reddish, grey, and black mottled
Luster: Glassy to dull

Identified May 23, 2026More igneous →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Pink, reddish, grey, and black mottled; Luster: Glassy to dull; Crystal structure: Phaneritic (coarse crystals visible); Specific Gravity: 2.63 - 2.75

Formation & geological history

Formed from the slow cooling of silica-rich magma deep underground (intrusive). Contains potassium feldspar, quartz, and minor mica/amphibole. Typical age ranges from hundreds of millions to billions of years.

Uses & applications

Widely used in construction, countertops, monuments, flooring, and as crushed stone for road building and landscaping.

Geological facts

Pink granite is the state rock of New Hampshire. The pink color is specifically caused by high concentrations of potassium feldspar (orthoclase).

Field identification & locations

Identify by its interlocking 'salt and pepper' crystalline texture and the dominant pink/salmon hue. Found globally in continental crust/cratons. Common in areas like Scotland, Texas, and Scandinavia.

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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)

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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