mineral
K-Feldspar Crystal
Potassium Feldspar (Microcline / Orthoclase, KAlSi3O8)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, pink to reddish-brown color, vitreous to pearly luster, and good prismatic cleavage at nearly 90 degrees.
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Physical properties
Hardness of 6 on the Mohs scale, pink to reddish-brown color, vitreous to pearly luster, and good prismatic cleavage at nearly 90 degrees.
Formation & geological history
Formed through the slow cooling of silica-rich magma deep within the Earth's crust, typically in pegmatites and granites.
Uses & applications
Widely used in the manufacture of ceramics, glass, porcelain, and as an abrasive or minor gemstone.
Geological facts
Feldspars are the most abundant group of minerals in the Earth's crust, making up about 41% of it. The pink color is usually caused by microscopic hematite inclusions.
Field identification & locations
Easily identified by its distinctive pink color, blocky crystal habit, and two cleavage planes meeting near 90 degrees. Commonly found in granitic pegmatites worldwide.
