mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9
- Hardness
- 2
- Color
- Pink, lilac, purplish-gray
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, purplish-gray; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9
Formation & geological history
Formed in granitic pegmatites during the late stages of magma crystallization. It is often associated with other lithium-bearing minerals like spodumene and tourmaline.
Uses & applications
A major source of lithium for glass making, ceramics, and laptop/phone batteries. It is also carved into decorative items, jewelry, and polished points for collectors.
Geological facts
Lepidolite is known as the 'peace stone' in metaphysical circles due to its high lithium content, which is used in psychiatric medicine to treat mood disorders. It occurs as massive aggregates or scaly 'books' of mica crystals.
Field identification & locations
Identified by its signature lilac to pink color and micaceous flake structure within the rock matrix. Common locations include Brazil, Canada, Madagascar, and the United States (Maine/California). Collectors should look for its pearly sheen and ease of scratching.
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