Lapis lazuli

Lapis lazuli (Tib. མུ་མེན་, mumen, Wyl. mu men) — a precious stone used in Tibetan medicine and in Vajrayana practices. Some dictionaries identify mumen with sapphire, but that seems dubious.

According to the Great Tibetan Dictionary and Tibetan medicine, the taste is astringent, the post-digestive effect is cooling, and it has the ability to bring benefit when afflicted by poisoning, leprosy, diseases related to lymphatic fluid (chu ser) and skin disorders.