Use natural garnet stone with 18k gold plated color-protective necklace. (from blue apatite to garnet) Material: natural garnet + 18k gold plated color necklace + American plated copper wire Origin: Hong Kong is handmade (basically all made by myself) [Notes on Electroplating Jewelry]: Necklaces and metal fittings are made of copper and are color-protected. The color retention effect varies from person to person. Try to avoid contact with perfumes and chemicals. Do not wear them when bathing or swimming. When you are dry and not wearing them as soon as possible after contact with sweat, store them in the box to avoid contact with air or direct sunlight. Thank you for your cooperation. 【size】: Blue apatite is about 40 MM long, not polished Necklace length: 16吋+ 2吋 extension chain [Usage and maintenance methods]: Try to avoid exposure to perfumes and chemicals Do not wear while bathing and swimming Dry as soon as possible after touching the sweat When not wearing, store it in a box to avoid contact with air or direct sunlight. 【package】: Each product comes with a small cloth bag and carton with a ribbon. If you want to write a card, I can do it for you. [Send method]: Hong Kong - Hongkong Post registered with tracking function. Other countries - Hongkong Post airmail registration, with tracking function. 【Precautions】: Natural stone is not perfect, each color, shade, texture is not the same, there are ice cracks, cotton wool, impurities and polishing, etc., please forgive me. Every product is hand-made by me personally, and artificial handwork is not perfect. Please consider it before you buy it. Thank you for your understanding.