The lepidolite gemstone is lithium-rich aluminum-based mica, and is categorized as a mineral, not a stone. It’s one of the major sources of lithium, as well as of some of the rarest alkali metals on Earth such as rubidium and caesium. Lithium is the most important out of them, however, as it is very actively used for things such as rechargeable batteries, domestic appliances like toasters and microwave ovens, and even aircraft parts. Often referred to as the “grandmother stone” or the “peace stone”, lepidolite is revered for its calming and nurturing properties. As such, lepidolite is often recommended as a stone for those who are under stress, who suffer from chronical anxiety, or who are just with a typically nervous nature.