Tourmaline is a fascinating and diverse gemstone that comes in a wide range of colors, making it unique among gemstones. It's a silicate mineral with a complex boron silicate structure, which is responsible for its variety of hues.

One of the most notable features of tourmaline is its ability to exhibit multiple colors in a single crystal, a phenomenon known as "bi-color" or "tri-color." This occurs due to the presence of different elements during its formation. For example, pink tourmaline is often favored for its vibrant and romantic hues, while green tourmaline can range from light to dark shades.

Tourmaline is also known for its pyroelectric and piezoelectric properties, meaning it can generate an electric charge when heated or pressed. This makes it a popular choice in various applications, including electronics and healing practices.

In terms of symbolism, tourmaline is believed to promote healing, balance, and protection. Each color is thought to carry its own specific energies and benefits, making it a versatile stone in both jewelry and metaphysical practices.

If you want to know more about a specific type of tourmaline or its uses, feel free to ask!