Lepidolite

Lepidolite is a lilac-gray or rose-colored member of the mica group of minerals. Lepidolite is the most abundant lithium-bearing mineral and is a secondary source of this metal.  Lepidolite is rated between 2.5 and 3 on the Mohs hardness scale.  Lepidolite is thought to protect against external influences; give inner peace; help with sleep disorders.