Lepidolite

Formula: KLi2AlSi4O10F(OH)

Series Formula: Kli2Al(Si4O10)(F,OH)2  to K(Li1.5Al1.5)(AlSi3O10)(F,OH)2

Colour: Pink, light purple, light rose red, other colors possible but are rare.

Lustre: Sub-Vitreous, Resinous, Greasy, Pearly

Hardness: 2½ – 3½

Specific Gravity: 2.8 – 2.9

Crystal System: Monoclinic

Member of: Trioctahedral mica Group > Mica Group, A series between Polylithionite and Trilithionite

Name: Named in 1792 by Martin Klaproth from the Greek words lepidos for “scale” and lithos for “stone”.