Zeolites

Complex silicate group | Mohs 3 - 5.5 | Various crystal systems

Zeolites are a group of silicate minerals that have a crystalline structure with a three-dimensional framework composed of silicon and oxygen atoms, with cations such as sodium, calcium and potassium occupying the pores and cavities within the structure. These minerals are known for their ability to adsorb and exchange ions, making them useful in a variety of applications.