How to test gold authenticity at home

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2018-03-26 08:26:12

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For the low ability to oxidize gold belong to precious metals. Hence, its value. The gold is a soft metal, so products made of pure material is very fragile. To increase the resistance of the jewelry to the gold is usually domeshivayut silver and copper. In some countries, it may be zinc, Nickel, palladium and cobalt. These metals increase the strength of the product, but they should be in small doses, because gold gives the product resistance to corrosion.

Why brand gold

To show the proportion of gold in the product, it put the stigma, which is also called the breakdown. In countries with metric system, the sample expressed in number of grams of precious metal per kilogram of alloy. For example, 585 indicates that a kilogram of the alloy is present 585 grams of gold. In other words, this product is 58.5% precious metal.

In countries with non-metric system to denote the ratio of precious and other metals in the product use carats. In some countries it is accepted as the test metric and carat. While carat is measured solely gold, other precious metals using the metric sample.

If you don't know how to test gold authenticity at home, first of all carefully inspect for external damage and the presence of official signs.

In the first place is to inspect the product

If you found the mark in carats, you should know that:

  • 9 carat 375 corresponds to the sample.
  • 12 CT - 500 sample.
  • 14k - 585 sample.
  • 18K - 750.
  • 21 CT - 875 sample.
  • 22 Karat is 917 the sample.
  • 23 CT - 958 sample.
  • 24 carat - 999 the sample, and denotes a noble metal in its purest form.

Jewelry should not have any obvious signs of corrosion. If available, this means that the composition of the product is not gold or its specific gravity below 30%.

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How to test gold with iodine

If, upon inspection of the product you can not find its samples, you'll need to figure out the gold or not, you help iodine. Since iodine is one of the few substances that reacts with gold, it will help to determine its authenticity.

To detect the presence of gold in the alloy, it is necessary to apply a bit of iodine. After a minute, the iodine can be washed. The product must stay in spot. If not, it's not made of gold. If the product is genuine, its grade can be determined at a jeweler or by using special equipment. This service is likely to be not free.

the Reaction of iodine with gold

How to test gold with iodine, so as not to damage the product? We must act with extreme caution. Apply iodine best on the reverse side. Appeared spot should be immediately cleared with a drink Coca-Cola or toothpaste.

If there is no iodine, to test fit the usual vinegar. Dip the product in a container with vinegar, if the product is darkened, before you is not gold.

Check gold magnet

Gold has the properties of magnets, and metals, which is usually included in the alloy jewelry. Therefore, this method not only for determining the presence of gold as its absence. We need to take a magnet and bring it to the product. If the product will stick to the magnet, it is definitely fake. The method is good in that case, if you openly try to inflate. Indeed, with the growth of modern technology, you can forge jewelry, even at home.

to Determine the gold magnet

Validation lyapisny pencil

How to test gold at home with the help of silver nitrate or, simply, spinnogo pencil? This pencil is the result of the reaction of silver and nitric acid. It is an excellent reagent and is widely used in medicine for sterilization of wounds. We needed to experiment with gold. Since the silver nitrate dissolves readily in water, to speed up the reaction product is water. Then hold on to it lyapisny pencil. The product of gold should not remain any traces.

Check the gold tooth

How to test gold if improvised no? You probably could see in movies like pirates finding gold, try it on the tooth. Doing the same Olympic Champions in presenting them gold medals, which soon became a tradition than a real test. In fact, this ancient as the world works to this day. Because gold is a very soft metal, after being bitten even with clean metal, it needs to stay track. And what is he deeper in the product of gold and, consequently, the higher its fineness.

a Method of gold alloy to the tooth

Validation in density

Gold - very heavy metal. Its density is for 19.32 g/cm3, behind only six other rare metals. Therefore, this quality is often used to determine the authenticity of gold. For example:

  • 14 carats (583 sample) corresponds to the density of the product 12,9 - 14,6 g/cm3
  • 18 carats (750) corresponds to the density of the product 15,2 - 15,9 g/cm3
  • The
  • 22 carats (916 sample) corresponds to the density of the product 17,7 - 17,8 g/cm3
  • 24 carats (999 sample) corresponds to the density of the product for 19.32 g/cm3

For starters, consider your product. If you don't have special weights, you can do it in a pawn shop. In contrast to the assay, this service jewelers have for free.

Weigh the need for gold on special scales

Then take the vial, preferably with graduated scale and fill it with water. The amount of water does not matter. The main thing that it covers the product. Dip into the tube a piece of jewelry and see how rose water on a scale. So you know the volume of the product.

Dividing the weight of the product on its volume, you get its density.

For Example, take gold 585. How to check? After weighing, we learned that the product weighs 27 g. Dropping the product in water, saw that the water rose to 2 ml. So the amount of goods 2 cm3. Dividing the weight of 27 g in a volume of 2 cm3, we get a density of 13.5 g/cm3, which corresponds to 14 carats.

How to test gold using ceramics

And if you bite the questionable products are not you want, and besides in the house there is the necessary inventory? How to test gold at home in this case? The answer is simple - with the help of ceramic ware. Take a plate, preferably white, and which is not a pity to spoil it. Put into it the product and RUB a bit. If the plate is left a black mark, the product is not made of gold, if the yellow trace, it is likely that the product is genuine.

you Need to RUB the product on ceramic plate

Knowing how to test gold, you can not only protect themselves from fraud, but also easy and quickly to determine the value of a found jewelry.


Article in other languages:

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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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