igneous

Pink Granite (Potassium-rich)

Phaneritic Felsic Igneous Rock (K-Feldspar Granite)

Hardness: 6-7 on Mohs scale; Color: Pink, salmon, or reddish-orange mottled with grey, white, and black; Luster: Dull/earthy when weathered, vitreous when fresh; Crystal structure: Phaneritic (coarse-grained); Specific gravity: 2.63 to 2.75.

Hardness: 6-7 on Mohs scale
Luster: Dull/earthy when weathered, vitreous when fresh

Identified March 20, 2026More igneous →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Formation & geological history

Formed from the slow cooling of silica-rich magma deep underground (plutonic) within the Earth's crust. This specimen appears to be a water-worn or glacial erratic cobble, likely hundreds of millions of years old.

Uses & applications

Used widely in construction as dimension stone, countertops, floor tiles, and as crushed aggregate for road beds. High-quality specimens are popular for landscape gardening and lapidary practice for beginners.

Geological facts

The distinct pink color is caused by an abundance of Orthoclase (Potassium) feldspar. Because granite is so durable, it forms the 'basement' of most continents and is the most common igneous rock found at the Earth's surface.

Field identification & locations

Identify by looking for interlocking crystals of pink feldspar, translucent grey quartz, and dark specks of mica or hornblende. Commonly found in mountainous regions or inside glacial glacial deposits across North America and Europe.

Other igneous specimens

See all

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

Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

mineral

Magnetite

Magnetite (Fe3O4)

mineral