mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
AI-generated identification · may be incorrectLepidolite has a Mohs hardness of 2.5 to 4, a pearly to vitreous luster, and a distinct lilac to rose-gray color. It exhibits perfect basal cleavage, yielding flexible thin sheets, and crystallizes in the monoclinic system.
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Physical properties
Lepidolite has a Mohs hardness of 2.5 to 4, a pearly to vitreous luster, and a distinct lilac to rose-gray color. It exhibits perfect basal cleavage, yielding flexible thin sheets, and crystallizes in the monoclinic system.
Formation & geological history
Lepidolite forms in granite pegmatites and high-temperature quartz veins through the hydrothermal alteration of lithium-bearing minerals.
Uses & applications
It serves as a primary ore of the alkali metal lithium and is frequently cut into cabochons or collected as mineral specimens.
Geological facts
Because of its high lithium content, lepidolite is structurally related to micas and often occurs alongside tourmaline and spodumene in pegmatite pockets.
Field identification & locations
Field identification relies on its characteristic lilac-pink color, micaceous flaky cleavage, and association with pegmatite zones. Common localities include Brazil, Madagascar, and the United States.
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Gneiss or Schist
Gneiss or Mica Schist with Garnet
Metamorphic
Limonite
FeO(OH)•nH2O
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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