Mixed Tourmaline Flat Bracelet with Crystal A Limited EditionFor those who feel that crystal alone is not enough For those who feel that crystal alone is not enough, we recommend this bracelet decorated with colorful tourmaline. The tourmaline used as the point comes in a variety of colors, including transparent, red, yellow, green, blue, purple, brown, and black. Tourmaline is also known to emit a weak electric current, but it also emits negative ions, so it is said to be a stone that is kind to people.