igneous

Pink Granite

Granite (High K-Feldspar variety)

Hardness: 6-7 on Mohs scale; Color: Pinkish-red with black and grey speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained intrusive); Specific gravity: 2.63 to 2.75

Hardness: 6-7 on Mohs scale
Color: Pinkish-red with black and grey speckles
Luster: Vitreous to dull

Identified May 9, 2026More igneous →

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Physical properties

Hardness: 6-7 on Mohs scale; Color: Pinkish-red with black and grey speckles; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained intrusive); Specific gravity: 2.63 to 2.75

Formation & geological history

Formed through the slow crystallization of magma below Earth's surface. This intrusive process allows for the growth of visible mineral crystals. Most granite deposits date back to the Precambrian or Paleozoic eras.

Uses & applications

Used extensively in construction for countertops, floor tiles, and monuments. Smooth river rocks like this are often used in landscaping or decorative gravel.

Geological facts

The pink color in this specimen is caused by an abundance of potassium feldspar (orthoclase). Granite makes up the majority of the Earth's continental crust.

Field identification & locations

Identify by its interlocking crystalline texture and hard surface that cannot be scratched by a steel nail. Commonly found in riverbeds or glacial tills where water erosion has rounded the edges into a 'river stone' shape.

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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