igneous

Pink Granite

Granite (Phaneritic igneous rock)

Hardness: 6-7 on Mohs scale. Color: Pink, reddish-orange with grey/white and black specks. Luster: Dull to vitreous. Crystal structure: Coarse-grained (phaneritic). Cleavage: None (fractures).

Hardness: 6-7 on Mohs scale
Color: Pink, reddish-orange with grey/white and black specks
Luster: Dull to vitreous

Identified May 19, 2026More igneous →

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Physical properties

Hardness: 6-7 on Mohs scale. Color: Pink, reddish-orange with grey/white and black specks. Luster: Dull to vitreous. Crystal structure: Coarse-grained (phaneritic). Cleavage: None (fractures).

Formation & geological history

Formed from the slow crystallization of magma below Earth's surface. High in potassium feldspar (orthoclase), which gives it the pinkish hue. Typical ages range from Precambrian to Cenozoic.

Uses & applications

Used in construction, countertops, monuments, landscape decorative stone, and as aggregate. Highly valued for durability and aesthetics.

Geological facts

Granite makes up a large portion of the Earth's continental crust. Mount Rushmore is carved into a granite batholith. The pink color is specifically due to an abundance of potassium feldspar.

Field identification & locations

Identify by its interlocking 'salt and pepper' crystalline texture and pinkish base. Found in mountainous regions or riverbeds where erosion has exposed the intrusive rock.

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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