mineral
Lepidolite in Quartz Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Hardness: 2.5-3.5; Color: Lilac, lavender, or light purple streaks in white/translucent matrix; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal (micaceous)
- Hardness
- 2
- Luster
- Pearly to vitreous
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Physical properties
Hardness: 2.5-3.5; Color: Lilac, lavender, or light purple streaks in white/translucent matrix; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal (micaceous)
Formation & geological history
Formed in granitic pegmatites during late-stage hydrothermal crystallization. It is a secondary mineral that requires lithium-rich environments to develop.
Uses & applications
Primary ore of lithium for batteries and aluminum alloys; used as a decorative stone and for metaphysical collecting.
Geological facts
Lepidolite is the most common lithium-bearing mineral on Earth. Its purple color comes from trace amounts of manganese.
Field identification & locations
Identified by its distinctive lavender color and foliated (flaky) texture within a harder quartz or feldspar matrix. Common in Brazil, Russia, and the United States (Maine/California).
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Mineral
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