igneous

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock (composed of Quartz, Alkali Feldspar, and Plagioclase)

Hardness: 6-7 Mohs; Color: Pink, reddish-brown, gray, white, and black specs; Luster: Dull to vitreous; Crystal Structure: Phaneritic (visible coarse grains); Cleavage: Distinct in feldspars, none in quartz; Specific Gravity: 2.63 - 2.75

Hardness: 6-7 Mohs
Color: Pink, reddish-brown, gray, white, and black specs
Luster: Dull to vitreous

Identified February 27, 2026More igneous →

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Physical properties

Formation & geological history

Formed through the slow crystallization of silica-rich magma deep beneath the Earth's surface (plutonic). Found in continental crust, often appearing in mountain roots or ancient shields formed during the Precambrian to Cenozoic eras.

Uses & applications

Extensively used in construction as dimension stone, countertops, floor tiles, and curbing. Also used in monuments, sculptures, and as crushed stone for road bases and railway ballast.

Geological facts

The pink color is specifically caused by an abundance of potassium feldspar (orthoclase). Granite is the world's toughest dimensional stone and has been used since ancient Egypt to build pyramids and obelisks.

Field identification & locations

Identify by its interlocking 'salt and pepper' crystalline texture and pink/salmon hue. Found globally in mountainous regions and shield areas like the Canadian Shield or the Scottish Highlands. Collectors look for unique large crystalline structures (pegmatites).

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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)

mineral

Magnetite

Magnetite (Fe3O4)

mineral