igneous

Pink Granite

Phaneritic Felsic Igneous Rock (Granite)

Hardness: 6-7 on Mohs scale; Color: Pink, reddish-orange, gray, and black speckles; Luster: Vitreous to dull; Crystal Structure: Phaneritic (coarse-grained); Cleavage: Perfect in feldspar grains; Specific Gravity: 2.63 to 2.75

Hardness: 6-7 on Mohs scale
Color: Pink, reddish-orange, gray, and black speckles
Luster: Vitreous to dull

Identified May 3, 2026More igneous →

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Physical properties

Formation & geological history

Formed through the slow crystallization of silica-rich magma beneath the Earth's surface (intrusive). This specimen specifically contains high amounts of potassium feldspar (orthoclase) giving it the pink hue. Often found in continental crust and mountain ranges.

Uses & applications

Extensively used in construction for countertops, floor tiles, paving stones, curbing, and monuments. Also used as crushed stone for road aggregate.

Geological facts

Granite is the primary component of continental crust. The pink color is specifically due to the presence of potassium feldspar. It is one of the hardest and most durable common rocks on Earth.

Field identification & locations

Identify by its interlocking coarse crystals of pink feldspar, translucent gray quartz, and black biotite or hornblende. Commonly found in batholiths and mountain cores like the Rockies or the Scottish Highlands.

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