Lepidolite
Lepidolite is a pink to purple lithium-bearing mica. It's an important source of lithium and valued for its soft lavender color.
Lepidolite properties at a glance
| Type | Minerals |
|---|---|
| Chemical formula | K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 |
| Mohs hardness | 2.5 |
| Crystal system | monoclinic |
| Luster | pearly |
| Streak | White |
| Cleavage | Perfect basal |
| Fracture | Uneven |
| Specific gravity | 2.85 |
| Transparency | translucent |
| Common colors | Pink, Purple, Lilac, Rose |
| Rarity | uncommon |
Geology & background
Forms in lithium-rich granite pegmatites, often associated with other lithium minerals.
First described in 1792, lepidolite has become increasingly important as a source of lithium for modern technology.
How to identify Lepidolite
- Check whether the specimen's color and texture match typical Lepidolite examples.
- Photograph a fresh surface in natural light and avoid shadows, glare, or wet surfaces.
- Use hardness, streak, luster, grain size, and locality together; no single trait is enough for every specimen.
Where Lepidolite is found
Lepidolite is reported from multiple localities or geological settings. Exact locality should be verified from specimen provenance, maps, or field notes.
How much is Lepidolite worth?
| Entry-level specimen | $5 |
|---|---|
| Typical collector specimen | $20 |
| Premium specimen | $100+ |
Value depends on size, condition, color, crystal quality, locality, rarity, preparation, and provenance. Treat this as educational guidance, not an appraisal.
Common uses
- Lithium extraction
- Jewelry
- Collector specimens
Interesting facts
- Major source of lithium for batteries
- Contains the highest lithium content of any mineral
- Name means 'scale stone' from Greek
Care & safety
Treat Lepidolite as a collector specimen unless hardness, cleavage, and fracture are confirmed.
Avoid inhaling dust. Do not cut, grind, or polish unknown specimens without eye protection and a properly rated respirator.
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