mineral
Lepidolite (Lithium Mica)
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Hardness: 2.5-3 (Mohs scale), Color: Pink, purplish-pink, lavender, lilac-gray, Luster: Vitreous to pearly, Crystal structure: Monoclinic (often appears as scaly aggregates), Cleavage: Perfect basal cleavage.
- Hardness
- 2
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Physical properties
Hardness: 2.5-3 (Mohs scale), Color: Pink, purplish-pink, lavender, lilac-gray, Luster: Vitreous to pearly, Crystal structure: Monoclinic (often appears as scaly aggregates), Cleavage: Perfect basal cleavage.
Formation & geological history
Formed in granitic pegmatites, often associated with other lithium-bearing minerals like tourmaline and spodumene. It forms through late-stage magmatic processes.
Uses & applications
A major source of lithium used in rechargeable batteries, glass-making, ceramics, and enamels. It is also used in jewelry as beads or cabochons and is popular in meditation/collector circles.
Geological facts
Lepidolite is one of the few lithium-bearing minerals and is known for its distinct pearly sheen and lilac-purple color, which is caused by trace amounts of manganese.
Field identification & locations
Identify by its lavender-pink color, low hardness (can be scratched by a copper coin), and the presence of small, flashy mica scales or 'pages.' Common locations include Brazil, Canada, Zimbabwe, and the USA (California and Maine).
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