Tourmalines are a large group of borosilicate minerals and are some the world's most popular gemstones! They are adored for their array of beautiful colors which is due to a huge variety of chemical compositions and color zoning. When conditions change during the formation of tourmaline crystals it can cause two or more colors to occur on a single crystal.
Tourmaline crystals are pyroelectric, piezoelectric, and produce negative ions. The word piezoelectricity means electricity resulting from pressure and latent heat. Pyroelectricity means the ability of certain materials to generate a temporary voltage when they are heated or cooled. This makes Tourmaline a very powerful stone to wear and keep in your space to create positive energy.