Langite is a rare hydrated copper sulphate mineral, with hydroxyl, found mostly but not exclusively in druses of small crystals. It is formed from the oxidation of copper sulphides, and was first described in specimens from Cornwall, United Kingdom. It is dimorphous with wroewolfeite. Langite was discovered in 1864 and named after the physicist and crystallographer Viktor von Lang (1838–1921), who was Professor of Physics at the University of Vienna, Austria. The colour is blue to blue green.

It  creates a protective barrier around oneself, preventing negative energy from penetrating. It facilitates the harmonious union of yin and yang energies within, maintaining balance and well-being in life.  Supports emotional well-being by facilitating emotional release techniques and heartfelt forgiveness practices, releasing emotional blockages. It encourages introspection, self-discovery, and growth. Langite makes it easier to navigate life’s challenges.