If you have any questions please feel free to contact us. We will reply within 24 hours. JEWELRY MAINTENANCE: * If allergy exists, stop wearing. This is a fashion jewelry, not real pure gold/silver * Keep this product out of reach of small children. * Reduce to touch sweat. * Take off the jewelry while bathing, washing. * Avoid the mixing with other jewelry or hard things. * Often clean it. * For example more sweat or bathing ….etc., will affect the color change.