What is "tourmaline"?

Tourmaline is a semi-precious gemstone that comes in a wide variety of colors, including black, brown, green, pink, and blue. It is a complex mineral that consists of boron, aluminum, silicon, and other elements. Tourmaline is known for its ability to generate an electrical charge when heated or put under pressure, a phenomenon called pyroelectricity and piezoelectricity, respectively. The stone is often used in jewelry, as well as in scientific instruments, due to its unique electrical properties. In addition, it is believed to have many metaphysical and healing properties, such as promoting love, happiness, and mental clarity.