Tourmaline is a complex and diverse group of minerals that come in a wide range of colors, making it one of the most versatile gemstones. It can be found in virtually every color of the rainbow, including black, blue, green, pink, and even colorless varieties. Each color can have different properties and meanings associated with it.

One of the most interesting aspects of tourmaline is its unique ability to exhibit multiple colors within a single crystal, known as bi-color or tri-color tourmaline. This feature adds to its appeal and makes it a favorite among gem enthusiasts.

In terms of rarity, certain colors of tourmaline, like the vibrant pink and green varieties, can be quite sought after, while others, like black tourmaline, are more common.

Metaphysically, tourmaline is believed to have protective properties, promoting grounding and balance. It is often associated with emotional healing and is thought to help in dispelling negative energy.

Overall, tourmaline is not only admired for its stunning appearance but also for its rich metaphysical properties, making it a popular choice for both jewelry and spiritual practices.