igneous

Pink Granite

Phaneritic Felsic Igneous Rock (composed primarily of Orthoclase Feldspar and Quartz)

Hardness: 6-7 on Mohs scale; Color: Pink, reddish, grey, and black; Luster: Vitreous to dull; Crystal structure: Phaneritic (coarse-grained); Cleavage: Perfect in feldspar grains; Specific gravity: 2.63 to 2.75

Hardness: 6-7 on Mohs scale
Color: Pink, reddish, grey, and black
Luster: Vitreous to dull

Identified May 23, 2026More igneous →

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Physical properties

Formation & geological history

Formed from the slow cooling and crystallization of silica-rich magma deep within the Earth's crust. Most granites date from the Precambrian to the Cenozoic eras and are associated with continental crust formation.

Uses & applications

Used extensively in construction for countertops, floor tiles, and grave markers. Also used as crushed stone for road base and interior architectural features due to its durability.

Geological facts

Granite makes up the core of most continental landmasses. The pink hue is specifically caused by a high concentration of potassium feldspar (orthoclase).

Field identification & locations

Identify by its interlocking 'salt and pepper' crystalline texture and lack of layering. Commonly found in mountainous regions or shield areas like the Canadian Shield or the Scottish Highlands. Collectors should look for large, well-defined phenocrysts.

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