igneous

Pink Granite

Granite (Alkali-feldspar granite)

Hardness: 6-7 Mohs; Color: Pink, orange, gray, and white; Luster: Dull to vitreous; Crystal structure: Phaneritic (coarse-grained) with visible crystals of orthoclase feldspar, quartz, and mica; Specific gravity: 2.63-2.75

Hardness: 6-7 Mohs
Color: Pink, orange, gray, and white
Luster: Dull to vitreous

Identified May 5, 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 is specifically due to a high concentration of potassium-rich feldspar (orthoclase).

Uses & applications

Extensively used in construction, countertops, monuments, floor tiles, and as decorative gravel. Polished varieties are popular for architectural cladding.

Geological facts

Granite makes up a large portion of the Earth's continental crust. Enchanted Rock in Texas and the peaks of the Sierra Nevada are famous examples of granite massifs.

Field identification & locations

Identify by its interlocking crystal texture and the abundance of pink feldspar. Commonly found in mountainous regions or glacial till. Collectors look for unique mineral inclusions like tourmaline or garnet.

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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