metamorphic
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Hardness: 2.5–3 on Mohs scale; Color: Purple, violet, or pink; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–3.0
- Hardness
- 2
- Color
- Purple, violet, or pink
- Luster
- Pearly to vitreous
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Physical properties
Hardness: 2.5–3 on Mohs scale; Color: Purple, violet, or pink; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal cleavage; Specific Gravity: 2.8–3.0
Formation & geological history
Formed in granitic pegmatites through hydrothermal processes. It is often found associated with other lithium-bearing minerals like spodumene and tourmaline. It typically dates from the Precambrian to Cenozoic eras depending on the specific deposit.
Uses & applications
Major source of lithium for batteries and glass/ceramic production; used as a decorative stone, in jewelry (cabochons), and highly valued by mineral collectors for its metaphysical associations.
Geological facts
Lepidolite was originally named 'lilalite' because of its lavender color. It is one of the primary sources of the rare alkali metals rubidium and cesium. It is often called the 'Peace Stone' in metaphysical circles.
Field identification & locations
Identify by its distinctive lilac/purple color and micaceous (flaky) structure. It is commonly found in Brazil, Canada (Manitoba), Madagascar, and the United States (California and Maine). Collectors should look for its pearly sheen and ease of scratching with a copper penny.
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