As the structure of internal secretion is different, the sweat of some people has more acid and some fewer and some contain more ammonia, so wearing the silver ornament causes different results. If the sweat is acid, it becomes dark easily; if not, not dark easily. Some people whose fat secrete exuberantly will even make the silver ornament shine brightly.
Most of silver ornaments have adding coating on the surface, except a few silver ornaments with original colors. So please do not use the silver polish cloth easily. Thought it has the adding coating, it still needs to be maintained well. When having much sweat, please do your best not to wear silver ornaments.