Black Onyx Crystal Stone Choker NecklaceSize Sheet Care Instructions Avoid contact with chemicals and sweat Keep dry and clean; store separately in a sealed bag when not wearing Avoid contact with chemicals such as perfume, skincare products, shower gel, etc. Avoid vigorous exercise or wearing while swimming Avoid wearing multiple metal accessories at the same time to prevent friction Avoid wearing while sleeping Product Details Chain length approx 45 cm with an approx 5 cm extender. All