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Mineralpedia Details for Lepidolite

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Lepidolite

Lepidolite

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahdera. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Lepidolite falls on or close to the Trilithionite - Polylithionite join and is a light mica with substantial lithium.  It contains fluorine in the (A) position. 

Found in complex zoned pegmatites.  Potassium is often replaced by Na, Rb, and Cs.

Formula
K(Li,Al)3(Si,Al)4O10(F,OH)2 
Crystal System
Monoclinic 
Crystal Habit
Platy, Foliated, Massive 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
colorless, gray white, lilac, yellowish, white 
Streak
white 
Class
Monoclinic 
Fracture
Uneven 
Hardness
2.5-3 
WebMineral
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Mindat
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Lepidolite from Zambezia prov., Mozambique

Lepidolite
            from Zambezia prov., Mozambique

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahdera. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Lepidolite falls on or close to the Trilithionite - Polylithionite join and is a light mica with substantial lithium.  Contain fluorine in the (A) position.

Can be easily distinguished from rgular mica by the flame test for lithium.

Found in complex zoned pegmatites.  Potassium is often replaced by Na, Rb, and Cs.

This specimen is all Lepidolite, with compact elongated pink crystals.

Click thumbnail images for larger view.

Lepidolite from Harding mine, Taos Co., New Mexico, United States

Lepidolite
            from Harding mine, Taos Co., New Mexico, United States

Phyllosilicate - Monoclinic - Mica group member. Ordinary (True or Common) Mica - Trioctahderal Lepidolite lies on or close to the Trilithionite - Polylithionite join and is a light mica with substantial lithium.  Contain fluorine in the (A) position. For more information on Mica minerals and other phyllosilicates please reference our article - Click Here.

Can be easily distinguished from rgular mica by the flame test for lithium.

Found in complex zoned pegmatites.  Potassium is often replaced by Na, Rb, and Cs.

Nice purplish pink, crystalline mass.

Click thumbnail images for larger view.

Lepidolite from Maxixe mine, Taquaral, Itinga, Minas Gerais, Brazil

Lepidolite
            from Maxixe mine, Taquaral, Itinga, Minas Gerais, Brazil

Purple Lepidolite ball otherwise known as "ball-peen" lepidolite. 4cm.

Click thumbnail images for larger view.

Lepidolite from Himalaya mine, San Diego Co., California, United States

Lepidolite
            from Himalaya mine, San Diego Co., California, United States

A thumbnail light purple cluster of Lepidolite crystals. These are good crystals for lepidolite so often found as compact masses.

Click thumbnail images for larger view.

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