igneous

Pink Granite

Phaneritic Felsic Igneous Rock

Hardness: 6-7 on Mohs scale. Color: Mottled pink, white, gray, and black. Luster: Dull to vitreous. Crystal Structure: Phaneritic (visible crystals). Composition: Orthoclase feldspar, quartz, and small amounts of biotite or hornblende.

Hardness: 6-7 on Mohs scale
Color: Mottled pink, white, gray, and black
Luster: Dull to vitreous

Identified April 12, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow cooling of silica-rich magma deep underground (intrusive). The pink color comes from potassium-rich orthoclase feldspar. Geological age can range from billions of years (Precambrian) to much more recent orogenic events.

Uses & applications

Used extensively in construction for countertops, monuments, and curbing. Small tumbled pieces are common in landscaping or as collector specimens.

Geological facts

Granite makes up a large portion of the Earth's continental crust. The pink hue is specifically caused by the presence of K-feldspar, which often dominates the rock's mineralogy in these specimens.

Field identification & locations

Identify in the field by its 'salt and pepper' look mixed with pink salmon tones. It is very hard and will scratch glass. Commonly found in mountainous regions or glacial till areas.

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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