mineral
K-Feldspar
Potassium Feldspar (KAlSi3O8)
AI-generated identification · may be incorrectMohs hardness of 6; pink, orange, or white color; vitreous to pearly luster; monoclinic or triclinic crystal system; distinct cleavage at nearly 90 degrees.
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Physical properties
Mohs hardness of 6; pink, orange, or white color; vitreous to pearly luster; monoclinic or triclinic crystal system; distinct cleavage at nearly 90 degrees.
Formation & geological history
Forms primarily in igneous rocks like granite and pegmatites through the slow cooling of magma.
Uses & applications
Used extensively in the manufacture of ceramics, glass, and as a scouring agent in abrasives.
Geological facts
Feldspars are the most abundant group of minerals in the Earth's crust, comprising about 60% of terrestrial rocks.
Field identification & locations
Identified easily by its characteristic pinkish hue and good rectangular cleavage; commonly found worldwide in continental crusts.
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Limonite
FeO(OH)•nH2O
mineral
Sandstone (with potential mineral staining/concretions)
Arenite (SiO2 based)
sedimentary
Tumbled granite
Granite, a coarse-grained felsic intrusive igneous rock
igneous
Pegmatite with Tourmaline and Quartz
Igneous Pegmatite
igneous
Epidote
Epidote | Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)
metamorphic