igneous

Pink Granite

Granite (Felsic Plutonic Rock)

Hardness: 6-7 (Mohs scale); Color: Pink to reddish-gray; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained); Cleavage: Distinct in feldspar grains; Specific gravity: 2.63 - 2.75

Hardness: 6-7 (Mohs scale)
Color: Pink to reddish-gray
Luster: Vitreous to dull

Identified March 29, 2026More igneous →

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Physical properties

Hardness: 6-7 (Mohs scale); Color: Pink to reddish-gray; Luster: Vitreous to dull; Structure: Phaneritic (coarse-grained); Cleavage: Distinct in feldspar grains; Specific gravity: 2.63 - 2.75

Formation & geological history

Formed through the slow crystallization of magma below Earth's surface. This specimen appears to be a water-worn river stone, smoothed over thousands of years of erosion. Typical geological ages range from hundreds of millions to billions of years.

Uses & applications

Used in construction for countertops and flooring, paving stones, and memorial monuments. Small polished specimens are often used in landscaping or decorative collections.

Geological facts

The pinkish hue is specifically caused by an abundance of potassium feldspar (orthoclase). Granite makes up much of the continental crust of Earth and is exceptionally durable against chemical weathering.

Field identification & locations

Identify by its interlocking crystalline texture containing pink feldspar, clear quartz, and dark biotite or hornblende grains. Common in mountainous regions or glacial deposits. For collectors, look for high variations in crystal size.

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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