Natural Stone Exquisite Tourmaline Heart Necklace. Size: Approximately 14mm*17mm*5.2mm thick; Metal Material: S925 Silver, stamped with S925. Chain Length: Approximately 44cm, adjustable. Product Number: A3113, comes with a pouch. Tourmaline has slightly different vibrations depending on the color of the stone, and the direction in which it exerts its power varies. However, it is generally believed to help the wearer to unlock their inherent abilities and human charm, amplify positive energy, and support them in shining in their own unique way. Tourmaline has another major characteristic in addition to its various colors. The crystals of this stone are columnar, but the properties of both ends are different, positive and negative, which causes them to become charged (electrified). Similar properties can be seen in quartz, but tourmaline has a stronger version of this property, and in Japanese, it is called "electric stone." Tourmaline itself does not generate electricity or conduct electricity. If left alone, it is just a stone, but when rubbed (friction) or heated, it becomes charged and is said to generate static electricity (negative ions). Therefore, if you want to take advantage of this property of tourmaline, we recommend wearing it as a necklace that directly touches the skin. * All stones used have been cleansed. ■ Due to the shooting environment, the color of the photo may look slightly different from the actual product. Instant purchase OK. Thank you!