mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
AI-generated identification · may be incorrectHardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; Luster: Vitreous to pearly; Crystal structure: Monoclinic; Cleavage: Perfect basal; Specific Gravity: 2.8-2.9
- Hardness
- 2
- Color
- Pink, lilac, or purple-grey
- Luster
- Vitreous to pearly
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Physical properties
Hardness: 2.5-3.5 on Mohs scale; Color: Pink, lilac, or purple-grey; 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 final stages of magmatic crystallization, often associated with other lithium-bearing minerals like tourmaline or spodumene.
Uses & applications
Primary source of lithium used in batteries and glass making; highly valued by collectors and used as ornamental stone or for metaphysical purposes.
Geological facts
Lepidolite is the most common lithium-bearing mineral and was first discovered in the eighteenth century. It was originally named 'lilalite' because of its lavender color.
Field identification & locations
Identifiable by its distinct purple/pink color and flaky, micaceous habit. It can often be peeled into thin sheets. Commonly found in Brazil, Canada, Madagascar, and the USA (Maine, California).
