igneous

Pink Granite

Phaneritic Felsic Intrusive Igneous Rock

Hardness: 6-7 on Mohs scale; Color: Pink, reddish-pink with speckles of black and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) featuring visible crystals of potassium feldspar, quartz, and mica; Cleavage: None (fractures irregularly); Specific gravity: 2.63 to 2.75.

Hardness: 6-7 on Mohs scale
Color: Pink, reddish-pink with speckles of black and white
Luster: Dull to vitreous

Identified April 6, 2026More igneous →

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Physical properties

Formation & geological history

Formed through the slow crystallization of magma below Earth's surface. The pink color is primarily due to an abundance of potassium feldspar (orthoclase). These rocks are typically from the Precambrian to Cenozoic eras, often found in continental crust and mountain belts.

Uses & applications

Used extensively in construction for countertops, floor tiles, and monuments. Also used as crushed stone in roadbeds and aggregates. While not a gemstone, it is popular among rockhounds and for garden landscaping.

Geological facts

Granite makes up a large portion of the Earth's continental crust. The distinctive pink color of this specimen suggests a high concentration of orthoclase feldspar. Famous monuments like the base of the Statue of Liberty are made of granite.

Field identification & locations

Identify in the field by its speckled 'salt and pepper' look with pink hues and its extreme hardness (it will scratch glass). Commonly found in glacial till, riverbeds, and mountainous regions like the Appalachians or the Rockies.

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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.

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