igneous

Pink Granite with Quartz Vein

Phaneritic Plutonic Felsic Rock (K-feldspar + Quartz + Plagioclase + Mica)

Hardness: 6-7 (Mohs); Color: Salmon-pink (orthoclase) with translucent gray (quartz) and black flakes (biotite); Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in two directions for feldspar, none for quartz.

Hardness: 6-7 (Mohs)
Luster: Vitreous to dull

Identified March 20, 2026More igneous →

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Physical properties

Formation & geological history

Formed through the slow cooling and crystallization of silica-rich magma deep within the Earth's crust. The prominent vein likely formed during late-stage hydrothermal activity where mineral-rich fluids filled fractures in the cooling rock.

Uses & applications

Construction (countertops, monuments), gravel/aggregate, and lapidary use for polished river stones or decorative garden features.

Geological facts

Pink granite gets its distinctive color from potassium-rich orthoclase feldspar. This specimen is a 'well-rounded' river cobble, indicating it has been transported and smoothed by water over a long distance.

Field identification & locations

Identify by its interlocking 'mosaic' texture, pink/orange color, and hardness (it will scratch glass). Commonly found in glacial till, river beds, and mountainous regions like the Canadian Shield or the Appalachians.

Other igneous specimens

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Blue Apatite

Fluorapatite (Ca5(PO4)3F)

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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.

Igneous

Magnetite

Iron(II,III) oxide (Fe3O4)

mineral

Sodalite

Sodalite - Na8(Al6Si6O24)Cl2

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Blue Apatite

Apatite (Group), Ca5(PO4)3(F,Cl,OH)

mineral

Magnetite

Magnetite (Fe3O4)

mineral