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Lepidolite identification and geology

Lepidolite mineral reference specimen

Lithium-bearing mica with a distinctive lilac to pink color. An important ore of lithium. Color: Lilac, pink, purple, gray. Luster: Vitreous to pearly. Streak: White. Cleavage: Perfect basal cleavage. Hardness: 2.5-3. Transparency: Translucent. Crystal system: Monoclinic. Chemical formula: K Li,Al ₃ AlSi₃O₁₀ OH,F ₂. Specific gravity: 2.8-2.9. Formation: Forms in lithium-rich granitic pegmatites, often associated with tourmaline, spodumene, and amblygonite. Common geological settings: Brazil, USA, Madagascar, Czech Republic; found in granitic pegmatites. Common look-alikes and related entries: Muscovite, Amethyst, Fluorite.

Sources, scope & corrections

These authoritative resources support category-level nomenclature, terminology, identification methods, and safety. When a specimen-specific safety warning appears, the public-health source listed here directly supports that precaution. They are not line-by-line citations for every other property on this entry, and natural specimens vary.

Editorial owner
GeoMiner
Last updated
2026-03-30T14:36:45.416095+00:00
Review status
Published; not independently peer-reviewed
  • IMA–CNMNC List of Mineral Names — International Mineralogical Association. Official mineral-name, nomenclature, and classification records.
  • Mineral ID Key — Mineralogical Society of America. Physical-property identification methods, repeat-testing guidance, and limitations.

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Common questions

What is Lepidolite?
Lithium-bearing mica with a distinctive lilac to pink color. An important ore of lithium.
How can you identify Lepidolite?
Compare several properties rather than relying on colour alone. This entry records colour: Lilac, pink, purple, gray; lustre: Vitreous to pearly; streak: White; Mohs hardness: 2.5-3; cleavage: Perfect basal cleavage; crystal system: Monoclinic; transparency: Translucent. Confirm an important identification with additional field tests or qualified laboratory work.
How does Lepidolite form?
Forms in lithium-rich granitic pegmatites, often associated with tourmaline, spodumene, and amblygonite.
Where is Lepidolite commonly found?
Brazil, USA, Madagascar, Czech Republic; found in granitic pegmatites.
What is Lepidolite commonly confused with?
Lepidolite may be confused with Muscovite, Amethyst, Fluorite. Compare multiple diagnostic properties because colour and surface appearance can overlap.

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