All About 375 Gold

The unique status of gold among other metals is due to external beauty, rarity and physical properties. The ever-increasing price of it makes it possible to increase capital. Gold items are not essential goods, but they are always in demand. Few gifts can be better than exclusive jewelry, which indicates the demand for this synonym for luxurious life, wealth and power. Gold items are marked in different ways, the article will talk about 375 gold samples.

Pure gold cannot fall into our hands. Natural metal is so ductile that it is molded like clay. To give greater strength, jewelers use alloys of a precious metal with other non-ferrous, but non-precious, which are called ligatures. These impurities improve the properties of precious metals, giving products, in addition to strength, wear resistance, resistance to damage due to deformation and ease of processing.

On all the jewelry presented on the windows of boutiques, a sample is placed, which by three-digit numbers shows the percentage purity of the composition or, otherwise, the amount of gold in a kilogram of mixed alloy. It serves as a guarantee that this is not a fake.

In the Russian jewelry industry, gold products are labeled with five samples: 375, 500, 585, 750, 958.

Sample 375 It has a composition with a small part of gold - only 37.5%, that is, 375 parts of pure gold, which corresponds to 9 carats, per 1000 parts of the alloy.Such compositions have a drawback - due to the formation of silver sulfide (Ag2S) darken in air.

For its natural bright yellow color the word Aurum, denoting the chemical element gold in the periodic table, it is translated from Latin as "shining dawn" or "light of sunrise." The Russian version of the word is actually a modified form of the adjective “yellow”.

The contained additives change the parameters and characteristics of the precious metal. Already ancient masters noticed that the best ligature is silver and copper.

Depends on the amount of silver and the speed of processing the alloy, and ductility, as well as a shade that brightens when the content is> 65%, becoming almost white. And with a smaller amount - from 30% to 65% - it gives a rich yellow tint.

Copper reduces the oxidation stability of gold, but makes it hard, occupying most of this base alloy. The saturated red color of the gold in the alloy is given by 60% copper with 2.5% silver. Copper, and most often its alloys with zinc (tompac) and brass, is the alloy composition most used in the jewelry industry.

When creating jewelry 375 samples of the master apply another 4 options for impurities:

• so that the shade is red, a ligature of 52.5% copper and 10% silver is suitable;
• 46% of copper and 16.5% of silver will give a dark yellow tint;
• the same number of components - 31% each - guarantees a yellow-pink color;
• in alloys with a predominance of silver up to 65% - the color is white.

The composition of 375 samples may add a small part palladium - 3.8%. Then silver and copper will be 10.0% and 48.7%, respectively.

Copper, of course, provides increased strength, but all these ratios of additives do not save the jewelry from oxidizability under the influence of oxygen contained in the air, and in a short period the product darkens noticeably.

Currently, to change the properties and color in the ligature add palladium, nickel, steel, cadmium, platinum, osmium and rhodium. Due to this, jewelry counters are replenished with new shades of precious metal products. Color spectrum This precious metal is unusually diverse in modern production.

In trend - design with a combination of different tones of consumer gold, for example, combinations of classic yellow with white and red. Jewelry with trendy fantasy shades came to the fore: for example, aquamarine or green.

The market of precious jewelry today offers a huge selection of jewelry for every taste - from budget options to unique pieces of jewelry. With such a huge assortment, it is very difficult to understand the consumer properties of the products presented in order to make the right choice.

The main difference, of course, is the share of precious metals in the alloy, which gives the beauty of things. There is little gold in 375 samples; therefore, it has low quality indicators in terms of aesthetic components.

Sample 585 appeared on the Russian jewelry market relatively recently. In the alloy, the proportion of gold is higher, which means that it is better in terms of aesthetic characteristics.

The purchase of jewelry marked with sample 375 is in most cases based on affordability compared to higher samples. But considerable advantages:

• high wear resistance;
• strength;
• resistance to mechanical stress.

But there is also significant disadvantage. Due to the high amount of copper, the metal's ability to oxidize increases, products are prone to tarnishing, so jewelry made of it often loses its attractiveness during operation.

Due to the high amount of additives, this base composition is sometimes jokingly called by jewelry industry workers. gold-bearing copper alloy although, in reality, by its status, it is undoubtedly gold.

Today, jewelers in the production of modern base jewelry add special elements to the metal, including rhodium, which significantly increase their resistance to oxidation and more look like a noble metal. As a result, the modern precious metal with the hallmark of 375 samples is able to maintain its presentable appearance, luster and beauty for longer.

Due to its features - strength, ductility, easy soldering, scratch resistance - cheap gold alloy is used in the manufacture of jewelry for everyday demand, for example:

• eyeglass frames;
• frames of semiprecious and decorative stones;
• wedding rings that are worn without taking off;
• earrings with cubic zirconias, amber, amethyst;
• smoking accessories;
• watch cases and bracelets that need a certain strength;
• decor elements for decorating picture frames, furniture and much more.

Take care of the product not from time to time, but regularly. A significant drawback of a low sample is its increased activity and susceptibility in an aggressive environment. The appearance and consumer properties of this alloy are quickly influenced by the oxygen contained in the atmosphere, which promotes the oxidation of the ligature. This negative effect can be reduced by periodically cleansing and observing proper storage conditions.

The danger for a low-sample product is represented by preparations with iodine, creams containing compounds of mercury, aggressive liquids, acetone and chlorine.

Deterioration in surface appearance is prevented by proper care. Dirty deposits are cleaned with an aqueous solution containing several drops of ammonia. Excellent quality erosion washing powder diluted in warm water. Dissolved cookery will help salt. Only soap for this purpose does not fit at all - it will leave a layer of oily film on the decoration.

It is possible to refine and clean darkened and tarnished gold items not only with purchased means, but also with improvised means at home.

A magnificent sparkle will return to the decoration if it is polished with a soft eraser or a velor rag. Old plaque will disappear after mechanical brushing with chalk. But you should remember about the measure and do not overdo it with mechanical cleaning, so as not to damage the applied drawing or engraving, which can be erased.

Will come to the rescue and onion juice. He also polishes his favorite jewelry.

To prevent products from darkening, carefully Keep them away from sunlight and radiators.. The metal is very sensitive to high humidity, jewelry should be wiped dry when they are wet. It is very important to avoid contact with each other metal products with different strengths, since ductile gold is too sensitive to contact.

Proper care can keep the jewelry in excellent condition for a long time, so that it can be passed on to the next generation of owners as a family value worthy of enthusiastic views.

The most ancient decorative gold of the Stone Age was found by archaeologists during excavations in the territory of modern Bulgaria. The circulation of gold in the form of coins around the world began after the capture by the Persians of the Lydian kingdom. The most popular gold coin in the world since 1284 and for 500 years was the Venetian ducat.

The impact of this metal on the financial sector is difficult to overestimate. People have always used it as a currency.

During the Gold Rush in America The first 17 pound nugget found in North Carolina was first recorded. But, of course, it cannot be compared with the heaviest mined ingot weighing 250 kilograms.

Despite the 150–200 thousand tons of rare metal mined by mankind in all ages, it is believed that this is only an insignificant part of it, no more than 1%, and the remaining gold reserves are in the magma of our planet. AND a huge amount is found in the waters of the oceans, but scientists have not yet invented technologies for its extraction from the ocean depths.

This precious metal is found not only on planet Earth. At the end of the 20th century, it became known that in space it abound. Only on the asteroid Eros is there more of it than it has been mined for all centuries on earth. And scientists are struggling to solve the technology of gold mining from space.

The list of useful properties of gold has grown significantly in recent years. Scientists are constantly conducting numerous experiments with gold and are finding more and more use for it. Today, gold is used not only as jewelry. It is widely used in the implementation of modern technologies in various industries, its practical benefits have been found in medicine.

The increasing use of gold in the aviation and space industries. The use of gold in the modern world is increasingly found in:

• telecommunications;
• nanotechnology;
• space industry.

One of the discoveries made by American scientists in the 21st century is the ability of a given metal to change its molecular structure under the influence of an electric field. And after the end of the exposure - to independently restore it.

Under the influence of an electric field, a yellow metal is capable of converting carbon monoxide to carbon dioxide, acting both as a conductor and as a current insulator. It was also experimentally proven that it can exhibit magnetic properties. These properties are very important in the electronics industry.

It can even be eaten, but only in small quantities in the form of metal flakes or plates along with food or drinks. If the portions are small, then the process of taking this kind of food will not bring any harm, because the human body already contains about 10 mg of gold. About half of this amount is concentrated in the bones, its content in the blood is about 1 mg per liter, small amounts can be found in the hair, skin and nails.

Goldschlager - Swiss schnapps worth $ 300 per bottle. This is the most amazing alcoholic drink in the world contains real gold in cereal - about 13 mg per liter.

Modern korean cosmetology effectively uses biogold in compounds with amino acids, natural plant components and extracts. Gold in colloidal form is an excellent catalyst that accelerates all the beneficial changes that occur in the skin during cosmetic procedures.

World-famous metal stretch in threads for decoration and decoration of expensive suits. Of course, such threads are very expensive and are produced in very small quantities as decorative items.

It is possible that it will soon become impossible to call the world's favorite noble metal yellow. After all, science and technology do not stand still.A variety of desired shades, far from the traditional and familiar yellow color, will be achieved not by changing the composition of the ligature, but by applying innovative technologies.

Scientists from Great Britain learned how to change yellow metal into all colors of the rainbow. They invented advanced technologies that can change the frequencies of electrons, forcing them to reflect light in the right way and thereby give the metal the desired shade.

See how to check gold for samples in the next video.