Tourmaline is a Japanese name "electric stone". The power is slightly different depending on the color such as pink, green and water melon. The common thing is that both ends are charged positive and negative, and rubbing generates negative ions. Negative ions are said to purify the water and air around them and relieve stress and irritation. It also protects you from electromagnetic waves, so it's suitable for office work, mobile phones and computers. 【Healing effect】 Relieve fatigue, revitalize energy, caring mind, guide human relationships with the surroundings, prevent getting caught in the emotions of others It is also the birthstone for October. Scale size Adjustable chain length 38 cm + 5 cm adjuster Raw material Chain, fasteners, etc / Brass Natural Stone / Pink Tourmaline Origin / Israel Note Do not drop from high places or handle roughly. The stone may break. All are created by hand. Please purchase after understanding. We only accept returns for defective products. ○ About the postage for Taiwan Free shipping items will be shipped by airmail. There is no tracking number. It usually arrives in about 5 business days, but it may take up to one month if an irregular event occurs. If you are uneasy please purchase the shipping fee. 【Additional Shipping Costs / Registered Mail】 https://jp.pinkoi.com/product/uvGiXypr We will ship by registered mail if the total price is over 5,000 yen. The tracking number will be notified when shipping.