metamorphic
Lepidolite in Mica Schist
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
Hardness: 2.5-3.5 (soft); Color: Purple, lilac, pink, to grayish-brown; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal (peels in sheets); Specific Gravity: 2.8-2.9.
- Hardness
- 2
- Color
- Purple, lilac, pink, to grayish-brown
- Luster
- Pearly to vitreous
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Physical properties
Hardness: 2.5-3.5 (soft); Color: Purple, lilac, pink, to grayish-brown; Luster: Pearly to vitreous; Crystal Structure: Monoclinic; Cleavage: Perfect basal (peels in sheets); Specific Gravity: 2.8-2.9.
Formation & geological history
Formed in regional metamorphic environments or late-stage magmatic crystallization in granite pegmatites. This specimen likely originates from a lithium-rich geological setting.
Uses & applications
Major source of lithium; used in glass and ceramic production, as a minor gemstone for cabochons/carvings, and popular as a metaphysical/collecting specimen.
Geological facts
Lepidolite is known as the 'peace stone' in folklore and is a significant ore for the rare alkaline metal rubidium. It is often found associated with other lithium minerals like tourmaline and spodumene.
Field identification & locations
Identify by its characteristic lilac/purple color and micaceous 'glittery' texture that flakes away easily. Commonly found in Brazil, Canada, Madagascar, and the USA (California/Maine).
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