If we turn to the periodic table, then gold is a heavy yellow metal with atomic number 79. In Latin, it sounds like aurum. Gold 750 - what does it mean? Where is it used and how much does it cost?
Use of gold
According to historical information, gold is a pioneer of metals with which humanity interacted. Acquaintance with him happened even 2-3 thousand years ago, as evidenced by the jewelry found at the excavations. Also, references to this precious metal are present in the Iliad and the Bible. Gold also aroused great curiosity among alchemists, who often looked for ways to turn metals into precious metals, to which they attributed great power.
In the modern world, gold has several functions:
- in commodity production, it performs the function of money;
- used in art for jewelry work;
- in medicine it is used as components of some drugs;
- also used in the chemical industry and electrical equipment.
Gold 750 - what does it mean
It is worth noting that pure gold without additives simply does not exist, there is always a percentage of certain impurities. The number of parts of pure metal that is contained in 1000 parts of the alloy is called breakdown. There are 4 sample systems accepted in the world: spool, metric, lot and karat. The most popular are metric and carat.
In our country, the metric system is widespread, that is, the ratio of the number of grams of gold per kilogram of jewelry alloy. Samples from 375 to 999 exist. 750 gold samples are most valued by lovers of expensive jewelry.
European countries and the United States are characterized by a carat system. A sample in carats is the ratio of the number of fractions of pure metal from 24 parts of the alloy. This system is exclusively for gold alloys.
585 or 750 gold test?
Most often, when purchasing jewelry, consumers encounter 585 and 750 samples. Russian lovers of precious metals often give their preference to products with a 585 breakdown, which is easily explained by the ratio of price and quality. However, jewelry made of such gold contains more impurities.
Gold itself is a very amorphous metal, and with constant wear the product could be deformed, or scratches would appear on it. When silver, palladium or nickel, zinc and copper are added, a harder alloy of the precious metal is obtained. 750 gold samples contain 25% of such additives as platinum, silver, palladium, copper and nickel.
Depending on the increase in the proportion of some components, it is possible to obtain an alloy of various shades: from pale pink to greenish. It can be noted that in Russia the reddish tint of gold is most common, and in Europe it is yellow. The famous "pure gold" is made by adding copper to the jewelry alloy. When the ingot is heated, a unique reddish tint is obtained.
750 gold sample is special in that it is easily polished and processed. The most sophisticated and sophisticated jewelry is obtained from this alloy. In addition, this gold can be used as an excellent base for enamel. Precious products of this kind are gaining more and more popularity.
But it is still worth noting that gold of 585 tests is more suitable for everyday wearing of jewelry, as it is more durable. If you compare how much the gold of 750 tests and 585 costs, then the gram of the first alloy is almost 1.5 times more expensive (the price is about 1100 rubles).
Quality Gold Products
Gold has a chemical ability: in its pure form it does not undergo oxidation and many other chemical influences. But when combined with other metals, these properties become different. It is generally accepted that gold alloys of sample 750 and higher are not subject to corrosion. It is worth noting that upon receipt of the alloy, the gold can be distributed unevenly, and then the area in which it is small or absent can be corroded. The jewelry in this place will be dull.
Italian gold
Many reputable jewelry stores offer products from "Italian gold." The name, as you might guess, came from the country of manufacture of jewelry. Jewelry of this kind has a special kind of processing. They are carefully sanded, and visually it seems that the products are shining. In addition, jewelry is distinguished by subtlety of work and various ornaments.
When purchasing such a product, it is worth paying attention that fraudsters can give a lower quality product for Italian gold of 750 samples. Real Italian jewelry must have a certificate. The colors of Italian gold, which can have white and yellow shades, are unaccustomed to the Russian eye.
Italy is a unique country. It occupies an honorable third place in the world in the production of jewelry for gold mining of not more than 100 kilograms per year. The rest of the material is purchased in South Africa. Thanks to the unique design, the profit from the sale of jewelry brings considerable revenue to the Italian treasury. The buyers of Italian jewelry are Switzerland, the USA, China, the United Arab Emirates and other countries.
White gold
White gold 750 - this is an alloy of gold with nickel or palladium. Sometimes platinum may be present. The white gold alloy itself has a rather dull sheen. In order to make it brighter, a thin rhodium coating is used, which, with frequent wear of the jewelry, needs to be updated regularly enough.
The work technique used when making jewelry is also characteristic - this is granulation. Tiny granules are welded to a very thin gold plate, and with their help a pattern is created on the product. This type of technology has its origins since ancient times, as evidenced by historical and scientific excavations.
Nowadays, many lovers of precious jewelry know such well-known jewelry houses as BULGARI, DIMIANI, which use the granulation technique.
When purchasing gold items, it is worth paying attention not only to the price, but also to the availability of the necessary certificates and passports. It is worth purchasing products from trusted and well-known manufacturers in specialized stores.