Does 925 standart gold exist?

The fineness is a measure that is used to assess the presence of gold in a kilogram of precious metal alloy. Most often, there are items with tests of 375, 585 and 750. But sometimes people come across items of 925 tests.

In our country, jewelry presented in retail outlets must be labeled. Gold samples - 7. Nowadays, many of them are outdated.

The following gold samples are known.

• 375. It is characterized by a precious metal content of 34.5%. The rest is impurities.
• 500. Half of the alloy is pure gold. Articles made of gold of this standard are very rare these days.
• 583... The alloy contains precious metal in the amount of 58.3%.
• 585... The share of the precious metal is 58.5%. Most of the jewelry that can be purchased in jewelry stores belongs to this sample.
• 750. The composition of the alloy contains a proportion of gold equal to 75%. This test has become widespread among jewelry and unique adornments.
• 958. Contains 95.8% precious metal. A number of similar gold ornaments have been produced in past centuries.
• 999... It is an alloy of pure gold, no impurities. It is very soft and cannot be used for jewelry making.

According to established standards, silver and gilding items are of 925 standard. There are no items made of gold corresponding to such a test in our country.

925 standard means the presence of 92.5% of the precious metal in the alloy. Products are marked with this sample, according to GOST. Adhering to the existing rules, when the weight of the product is less than 3 g, the manufacturer does not test it in the state chamber.Here you should put a stamp and indicate the number 925 inside.

Sterling silver is considered to be of the highest quality. Along with gold, Ag is not used to create jewelry in its pure form, because the metal itself is ductile and therefore does not last long. Therefore, in order to increase the density of the metal, a ligature is added to it, that is, impurities of metals such as Ge, Zn, Br, Si, Pt.

The interesting thing is that these materials in combination with silver give unique colors and can affect the ability of silver to oxidize. 925 sterling silver jewelry is very delicate, which enhances their popularity. Ag of high purity goes well with gold, which is why in most cases jewelry is a harmonious combination of these metals.

Jewelry salons in most cases offer a large assortment of gilded items made of 925 sterling silver. Such items are plated with gold. A common man in appearance of a product will not distinguish it from real gold.

The popularity of silverware is due to the following factors:

• they look gold;
• they have a lower price per gram.

Silver of high standard goes well with precious stones: diamonds, topaz and others.

Products made of silver look with special elegance and grace. 925 metal is used for the manufacture of cutlery, for example, spoons. The disadvantage of silver is its low estimated price when delivered to a pawnshop.

Visually distinguishing between silver and white gold is difficult. This is only possible after careful examination of the marking... New items in both silver and gold may look identical due to the final radium coating. The latter is treated on the surface of the metal in order to increase the shine and prevent the occurrence of darkening.

In the absence of markings, the authenticity of the metal can be confirmed at a pawnshop or jewelry workshop, where a specialist will conduct an analysis using the following elements.

In this case, the product is slightly filed so that the cut is fresh and the reagent can be applied to it. If gold is checked, then there should be no reaction, if there was one, it means that the product is made of metal that does not correspond to the specified sample. When silver is tested, then a red-brown color should appear at the cut site, in the absence of which it can be judged that the metal being tested does not belong to silver.

Alloys of precious metals are tested using certain types of stones. Objects rub against the touchstone. If the resulting trace does not meet current standards, it means that the alloy has a much lower proportion of precious metal than stated.

Most jewelry workshops, outlets or buyouts are equipped with devices that allow you to establish the exact proportion of precious metals in the alloy.

In the conditions of an apartment, you can check in the following ways.

• Using paper. Draw a line on a piece of paper with an ornament. After gold, nothing will remain, and after silver, even high-grade silver, a dark line will remain.
• With acid. Mix 15 g of vinegar with 250 ml of water, stir well. In the resulting mixture, lower the object to be checked. When silver is immersed, the water will darken, and the product itself will undergo oxidation. Gold is not afraid of acid and will not give any reaction.
• You can draw a strip on the product using iodine... No trace will be imprinted on the gold. In the case of silver, the product will be colored.

925 standard corresponds to an alloy, the structure of which includes several elements that give color and strength to the precious metal... Items made of 925 sterling precious metal are 92.5% silver, the rest is copper. It is added to give the metal strength. Due to the presence of impurities, even gold becomes white and becomes similar to silver.

Sterling silver is very durable and works well. There are no scratches on products made from such metal.

Silver jewelry does not deform. The indentations for the stone in white alloys are created so that the legs that hold the stone do not loosen and the stones do not fall out.

The manufacturer places a stamp on the material at the last level of creation, after which the metal is sent to the assay office, where its properties and the proportion of pure silver concentration are assessed. If the concentration percentage is in accordance with the applicable standards, a sample is applied.

Pure silver is a white heavy metal with excellent reflectivity - about 95% of the spectrum. Due to this property, silver is widely used in the manufacture of mirrors. The density of silver is 10.5 g / cm3, which is almost two times lower than the density of gold, but higher than copper and iron.

The main properties of silver include:

• the presence of high thermal conductivity among all metals;
• good electrical conductivity;
• the melting point is the lowest of all precious metals.

Since the alloy is quite durable, elements of watches and jewelry are made from it.

In order for silverware to serve for a long time, you should follow the rules related to care and cleaning.

• Clean monthly. You can use the services of a workshop, where, using ultrasound, they clean the product inside and outside, clean the stones.
• Store in a dry place.
• Do not wear jewelry before handling water.
• Do not allow perfume to come into contact with stones and the product itself.

When choosing jewelry, attention should be paid to labeling. Any item made using precious metals has manufacturer's tags, where the method of communication is indicated, and the store's price tag must also be available.

There should be no piercing elements in the decoration of jewelry. It is better to choose a product that is comfortable and lightweight. It is necessary to pay attention that the stone or path of stones is not too raised up.

When buying jewelry with a diamond larger than 0.4 cm in diameter, you should check is there a certificate for it.

For even more interesting information about 925 sterling silver, see the next video.