igneous
Lepidolite on Pegmatite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) in Granitic Pegmatite
Hardness: 2.5-3.5; Color: Pink, lilac, violet, or gray; Luster: Pearly to Vitreous; Crystal structure: Monoclinic; Cleavage: Perfect basal.
- Hardness
- 2
- Color
- Pink, lilac, violet, or gray
- Luster
- Pearly to Vitreous
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Physical properties
Hardness: 2.5-3.5; Color: Pink, lilac, violet, or gray; Luster: Pearly to Vitreous; Crystal structure: Monoclinic; Cleavage: Perfect basal.
Formation & geological history
Formed in granitic pegmatites through the crystallization of lithium-rich residual magmatic fluids during the final stages of cooling.
Uses & applications
A major source of lithium; used in glass and ceramic manufacturing, and popular as a decorative stone or lapidary material.
Geological facts
Lepidolite is one of the primary minerals containing Rare Earth Elements like Rubidium and Cesium. It is often called the 'Stress Stone' in metaphysical circles due to its high lithium content.
Field identification & locations
Identify by its distinctive lilac-to-purple color and scaly, micaceous sheets that can be flaked off with a fingernail. Commonly found in pegmatite districts like Brazil, Madagascar, and Maine, USA.
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