This is a triple-strand bracelet made with multi-colored tourmaline beads. It can also be used as a necklace. Approximately 23 centimeters long. - Material: Tourmaline - Color: Multi-color - Shape: Beads - Size: Triple strand Tourmaline is a general term for a group of more than 10 minerals and is the birthstone for October, known for its diverse colors. It is also called "electric stone" because it becomes electrically charged through friction or heating. It is also said to have power stone effects such as promoting health, reducing stress, and releasing negative ions, and there are many types, including Paraiba tourmaline. Thank you for viewing.