igneous
K-Feldspar Granite or Potash Feldspar
Potassium Feldspar (Orthoclase / Microcline)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, distinctive pink to salmon-orange color, vitreous to pearly luster, and two directions of cleavage at nearly 90 degrees.
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Physical properties
Hardness of 6 on the Mohs scale, distinctive pink to salmon-orange color, vitreous to pearly luster, and two directions of cleavage at nearly 90 degrees.
Formation & geological history
Formed from the slow cooling of magma rich in silica and potassium deep within the Earth's crust.
Uses & applications
Used in the manufacture of ceramics, glass, porcelain, and occasionally as a decorative gemstone or ornamental stone.
Geological facts
Feldspars are the most abundant group of minerals in the Earth's crust, making up about 60% of terrestrial rocks.
Field identification & locations
Easily identified in the field by its characteristic pinkish hue and blocky crystal cleavage planes; found worldwide in pegmatites and granites.
