Natrolite is a mineral belonging to the zeolite group, primarily composed of sodium, aluminum, and silicon. It typically forms as colorless or white crystals, often found in volcanic rocks and as a secondary mineral in basalt. Its unique needle-like crystal structure can create beautiful formations, making it a popular specimen among mineral collectors. This mineral is known for its ability to absorb water and other substances, which is a characteristic feature of zeolites. Natrolite is often used in various industrial applications, including water purification and as a catalyst in chemical reactions, due to its porous nature.