igneous
Pink Granite / K-Feldspar
Alkali feldspar granite / Potassium feldspar (Microcline/Orthoclase)
Hardness of 6 on the Mohs scale, pale pink to salmon color, vitreous to pearly luster, monoclinic or triclinic crystal structure, perfect to good cleavage in two directions, specific gravity around 2.5-2.6
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Physical properties
Hardness of 6 on the Mohs scale, pale pink to salmon color, vitreous to pearly luster, monoclinic or triclinic crystal structure, perfect to good cleavage in two directions, specific gravity around 2.5-2.6
Formation & geological history
Formed through the slow cooling of magma rich in silica and potassium deep beneath the Earth's crust, typically associated with continental crust formation over millions of years
Uses & applications
Commonly used in kitchen countertops, architectural building stone, monuments, and as a raw material in ceramics
Geological facts
Potassium feldspar is one of the most abundant rock-forming minerals in the Earth's continental crust and is responsible for the distinct pink hue in many granites
Field identification & locations
Easily identified by its characteristic pink or salmon color, blocky crystal form, and lack of reaction to acid; commonly found in intrusive igneous rock formations worldwide
