Fashion, Jewelry
I wonder why the silver cross turns black?
Silver is one of the richest in the mystical values of metals. It is used for decoration as well as ritualistic activities in Christianity. Also, his adherents of various occult sciences use it . It is believed that this metal is pure, can save its owner from the effects of evil spirits, slander and evil eye. It is this almost all sorcerers explain why a silver cross turns black on some people. Say, they have jinxed them, that's metal and reacts.
Another common opinion, why the silver cross is black, is the connection of silver and diseases of the body. It is believed that the darkening of these ornaments signals about liver and kidney diseases. However, there is no scientifically confirmed data on this score. Definitely one thing is known - the reason why the silver chain, the cross and other ornaments turn black, is a chemical reaction. Yes, it all comes down to the usual chemistry. The fact is that any silverware contains copper, which is very strongly oxidized. And the main oxidizer for it is the usual human sweat, or rather the amino acids contained in it, which contain sulfur compounds. They are what cause the reaction.
Then the question immediately ripens: "Why does the silver cross not blacken at all and not always?" To answer it, you should also remember the lessons of anatomy. Each of us has the composition of sweat individual. It is defined as the hormonal background, and the general state of the body and metabolism. It happens that when a person develops "hormonal storms", with the acceleration of metabolism or simply with increasing physical exertion, a change in lifestyle, diet or place of residence, the sweat composition begins to change. Accordingly, the level of amino acids changes, or, as it habitually sounds, the level of acidity of sweat changes. With the increase in this level, the processes of silver oxidation begin to occur more actively.
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