Boron

In alchemy, boron has been used for a variety of purposes. It has been used as a catalyst in chemical reactions, as a hardening agent for metals, and as a component in the production of ceramics and glass. It has also been used medicinally, and was believed to have healing properties. Boron has also been used as a pigment in the production of paints and dyes, and was sometimes used to create decorative objects and jewelry.