Natural Stone Exquisite Green Tourmaline Ring Size: Approximately 11.2mm * 12mm * Thickness 4.8mm; Tourmaline Stone Size: Approximately 5mm * 6mm; The tourmaline is surrounded by zircon. Weight: Approximately 2.13g; Ring Size: Adjustable free size. Recommended for free size rings: ● Those who are unsure about ring size, "I don't know my ring size..." ● Those whose rings become tight due to swelling at night. Metal Material: s925 Silver, stamped with s925; Comes with a bag, product number A4850; Tourmaline has slightly different vibrations depending on the color of the stone, and the direction in which it exerts its power differs, but basically, it is said to help the wearer to blossom their inherent abilities and human charm, amplify positive energy, and support them in shining in their own way. Tourmaline has various colors, and another major characteristic. The crystals of this stone are columnar, but the properties of both ends are different, positive and negative, which causes it to become charged (electrified). Similar properties can be seen in quartz, but tourmaline has a stronger version of this property, and it is called "electric stone" in Japanese. Tourmaline itself does not generate electricity or conduct electricity. If left alone, it is just a stone, but it is said that when rubbed (friction) or heated, it becomes charged and generates 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 purified. ■ The color of the photo may look slightly different from the actual product depending on the shooting environment. Instant purchase OK. Thank you!