mineral
Feldspar
Potassium or Plagioclase Feldspar (KAlSi3O8 - NaAlSi3O8)
AI-generated identification · may be incorrectHardness of 6 on the Mohs scale, pink to white color, vitreous to pearly luster, monoclinic or triclinic crystal structure, with good cleavage at right angles.
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Physical properties
Hardness of 6 on the Mohs scale, pink to white color, vitreous to pearly luster, monoclinic or triclinic crystal structure, with good cleavage at right angles.
Formation & geological history
Formed through the crystallization of magma in igneous rocks or as a primary component in metamorphic and clastic sedimentary rocks.
Uses & applications
Widely used in the manufacture of ceramics, glass, porcelain, and as a dimension stone or occasional gemstone.
Geological facts
Feldspar is the single most common mineral group in the Earth's crust, making up about 41 percent of it.
Field identification & locations
Identified easily by its rectangular crystal habit, blocky cleavage, and distinctive hardness scratching glass with difficulty.
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Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
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Limonite
FeO(OH)•nH2O
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Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Feldspar
Feldspar Group (Tectosilicate, e.g., KAlSi3O8)
mineral