The law requires metal to be marked by the maker and the metal quality. For sterling, the mark will be either the numbers 925 (meaning 92.5% silver, which is sterling) or a "sterling" stamp with the words. Near the clasp should have a label, it will be at the end of the chain if anything. Sometimes the sign of the little flat looking ring at the end of the chain, so check around.
Sterling silver will tarnish and on some people it tarnishes quickly due to body chemistry, but others can not tarnish. To tarnish from happening, sterling is very often plated with another metal to protect the sterling and keep the tarnish from događa.Pozlaćivanje will be a metal called "rhodium" which is very bright or another metal recently used on silver that looks more silver color . However, the chain may be true, and still have a plate on the outside to prevent tarnish.
In addition, the only real way to tell if something is silver is to test. For example, such as the acid test done by a jeweler. Generally a test will cost some money, not much, but maybe not worth it, depending on what you paid for the chain. In a large heavy chain, the test might be worth, but it's all up to you.
I suggest thinking about where you get the chain from and whether or not you get it from poslovanja.Uspostavio business established to serve little purpose in selling anything fake silver. Always looking for signs of both Sterling and the seal or symbol to produce as I said before. Both of these labels should be there.
Here is some information on how to tell if a gold bracelet is really zlata.Klora in bleach is dangerous to gold jewelry, so it's best not to test gold in bleach, otherwise you'll ruin your jewelry. Stress points like where the metal was hammered, bent over stones in prongs, make a chain of machines, etc. are most affected by chlorine. Soldering area is sometimes affected by chlorine. White gold is easily damaged but apparently this happens with yellow gold and the stress points of metals.
chlorine will cause a darkening on gold, but yellow gold it looks almost like a very pale gray. White gold reacts the same way, but sometimes goes darker. It is chlorine reacts to metals in karat gold. All metal jewelry 18k, 14k and 10k has other metals in the recipe, when the metal is made. Pure gold is mixed with mostly silver and copper (with nickel or palladium with white gold) to make metal strong enough for jewelry.
karat mark shows how much pure gold is in the mix. For example, pure gold is called 24k. Now, 10k will have 10 parts pure gold and 14 parts other metals, all adding up to 24 part. 18k gold will be 18 parts pure gold and 6 parts other metals, all adding up to 24 parts. This is how it goes with karats.
Yellow gold is not so dangerous influence of chlorine bleach and a good polish should be ok, that is, if this is really zlato.Najbolji way to see if it is real karat gold is to have it tested. This means the acid test or a test using one of the newer electronic gold cover some jewelers use. This is what I recommend.