mineral
Feldspar
Aluminosilicate (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
AI-generated identification · may be incorrectHardness of 6 on Mohs scale, white to gray or pinkish color, vitreous to pearly luster, monoclinic or triclinic crystal structure, good cleavage in two directions.
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Physical properties
Hardness of 6 on Mohs scale, white to gray or pinkish color, vitreous to pearly luster, monoclinic or triclinic crystal structure, good cleavage in two directions.
Formation & geological history
Formed through the cooling of magma or lava in igneous environments, as well as in metamorphic and sedimentary rocks.
Uses & applications
Used extensively in the manufacture of glass, ceramics, pottery glazes, and as a flux in metallurgy.
Geological facts
Feldspar is the most abundant group of minerals in the Earth's crust, making up about 60% of terrestrial rocks.
Field identification & locations
Easily identified by its rectangular crystal habit, two cleavage planes meeting near 90 degrees, and a hardness that scratches glass.
