igneous
K-Feldspar / Granite Fragment
Potassium Feldspar (Microcline/Orthoclase) with Quartz
AI-generated identification · may be incorrectHardness 6 on the Mohs scale, pink to white coloration, vitreous to pearly luster, and distinct cleavage at nearly 90 degrees.
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Physical properties
Hardness 6 on the Mohs scale, pink to white coloration, vitreous to pearly luster, and distinct cleavage at nearly 90 degrees.
Formation & geological history
Formed from the slow crystallization of felsic magma deep within the Earth's crust, typically part of intrusive igneous rocks like granite.
Uses & applications
Used in the manufacture of ceramics, glass, and as a decorative architectural stone.
Geological facts
Feldspars are the most abundant group of minerals in the Earth's crust, comprising roughly 41% of it.
Field identification & locations
Identified by its pinkish-orange hue, blocky crystal form, and two cleavage planes meeting near right angles; common in continental glacial drift and stream beds.
