igneous

Pink Granite

Phaneritic Plutonic Rock (Granite with K-Feldspar)

Hardness: 6-7 Mohs; Color: Pink, white, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63-2.75.

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

Identified April 6, 2026More igneous →

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Physical properties

Hardness: 6-7 Mohs; Color: Pink, white, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (large, visible crystals); Specific gravity: 2.63-2.75.

Formation & geological history

Formed from the slow cooling of magma deep beneath the Earth's surface (intrusive). The pink color is caused by an abundance of potassium feldspar (orthoclase).

Uses & applications

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

Geological facts

Pink granite is the state rock of New Hampshire. It is one of the hardest natural stones used in architecture and can withstand thousands of years of weathering.

Field identification & locations

Identify by its 'salt and pepper' appearance with distinct pink/salmon hues. Look for interlocking crystals of quartz, feldspar, and biotite. Common in continental crust and mountain ranges.

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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