750 sample of gold - what is it? How much does the gold cost 750?
If we turn to the periodic tableMendeleev, then gold is a heavy metal of yellow shade with atomic number 79. In Latin it sounds like aurum. Gold 750 tests - what does this mean? Where it is applied and how much does it cost?
According to the historical certificate, gold -a pioneer of metals with which humanity interacted. Acquaintance with it happened 2-3 thousand years ago, as evidenced by the jewelry found on excavations. Also mention of this precious metal is present in the Iliad and the Bible. A great curiosity, gold caused and the alchemists, often looking for ways to convert metals into precious, to which they attributed great power.
In today's world, gold has several functions:
- in commodity production it fulfills the function of money;
- in art used for jewelry work;
- in medicine is used as components of some drugs;
- It is also used in the chemical industry and electrical equipment.
Gold 750 - what does it mean
It should be noted that pure gold without additivessimply does not exist, there is always some percentage of certain impurities. The number of pieces of pure metal that is contained in 1000 parts of the alloy is called a breakdown. In the world, 4 sampling systems are adopted: spool, metric, lot and carat. The most popular ones are metric and carat.
In our country, metricsystem, that is, the ratio of the number of grams of gold per kilogram of jewelry alloy. There are samples from 375 to 999. 750 test of gold is highly valued by lovers of expensive jewelry.
European countries and the USA are characterized by a karatesystem. A carat sample is the ratio of the number of pure metal fractions from 24 parts of the alloy. This system is provided exclusively for gold alloys.
585 or 750 gold sample?
Most often when buying jewelryconsumers face 585 and 750 tests. Russian lovers of precious metals often give preference to products with 585 breakdown, which is easy to explain by the ratio of price and quality. However, jewelry items made of such gold contain more impurities.
Gold itself is a very amorphous metal, and whenthe product could be deformed permanently, or there would be scratches on it. With the addition of silver, palladium or nickel, zinc and copper, a more solid alloy of precious metal is obtained. 750 gold sample contains 25% of additives such as platinum, silver, palladium, copper and nickel.
Depending on the increase in the share of somecomponents, it is possible to obtain an alloy of various shades: from gently pink to greenish. It can be noted that in Russia the reddish shade of gold is most common, and in Europe it is yellow. The well-known "red gold" is made by adding copper to the jewelry alloy. When the ingot is heated, a unique reddish shade is obtained.
750 gold sample is special in that it is easypolished 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 now gaining popularity.
But still it is worth noting that for everydaywearing jewelry is more suitable gold 585 tests, as more durable. If you compare how much gold costs 750 and 585, then the gram of the first alloy is almost 1.5 times more expensive (the price is about 1100 rubles).
Quality of gold products
Gold has a chemical ability: in its pure form it is not subjected to oxidation and other chemical effects. But when combined with other metals, these properties become different. It is generally accepted that gold alloys of 750 and above are not exposed to corrosion. It should be noted that when making an alloy, gold can be distributed unevenly, and then a site in which it is small or completely absent, can be corroded. Jewelry in this place will be dull.
Many reputable jewelry stores offerproducts from "Italian gold". The name, as you might guess, originated from the country producing the jewelry. Ornaments of this kind have a special kind of processing. They are thoroughly polished, and visually it seems that the products are shining. In addition, the decorations are distinguished by the fineness of the work and various ornaments.
When buying such a product, it is worthwhileattention that fraudsters can issue a product of lower quality for Italian gold of 750 tests. Real Italian jewelry must have a certificate. For the Russian eye, the colors of Italian gold are not widely used, which can have white and yellow shades.
Italy is a unique country. It occupies an honorable third place in the world for the production of jewelry in the extraction of gold 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 profits to the treasury of Italy. Buyers of Italian jewelry - Switzerland, USA, China, United Arab Emirates and other countries.
White gold of 750 tests is an alloy of gold withnickel or palladium. Sometimes platinum may be present. The very alloy of white gold has a rather dull sheen. In order to make it more vivid, a thin rhodium coating is used, which, when the jewelry is frequently worn, must be updated regularly.
Typical and used when performingjewelry work techniques - 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 long ago, as evidenced by historical and scientific excavations.
Currently, many lovers of precious jewelry on hearing such famous jewelry houses, like BULGARI, DIMIANI, who use the technique of granulation.
When acquiring gold items, it is worthwhileattention not only to the price, but also to the availability of necessary certificates and passports. It is worth buying products of proven and well-known manufacturers in specialized stores.