All about metal black gold

Many are accustomed to the fact that gold is yellow, white, pink and red. However, in 2001, the world learned about the metal of an unusual black color. It was first shown at Basel. Products made from such material are quite expensive and unusual. The alloy of such gold is made at the Fawaz Gruosi jewelry house according to a secret recipe, but there are also known methods of obtaining it.

Pure gold is only yellow. Any other color is due to additives. Black gold contains 15% cobalt and 10% chromium. The metal looks pretty unusual and attractive.

The resulting material belongs to the group of intermetallic compounds. It is difficult to handle and is unyielding when melted and forged.

Black gold is much stronger than yellow gold. It is extremely difficult to deform it; it is practically insensitive to mechanical damage. These properties are due precisely to the additives in the alloy. Additional metals have high strength.

The coloration can range from gray to charcoal black. The metal can have a green or blue tint. These effects are achieved by introducing additional materials into the alloy. It should be noted that items made of black gold always bear the 750th standard. This is due to the proportions of the components to obtain the desired shade.

An unusual color on such jewelry is achieved by rhodium plating. Over time, the coating can wear off and lose its attractiveness. The decorative layer will need to be updated from time to time.

Black gold is not very popular in jewelry. Alloy with cobalt and chromium can cause irritation and redness on the skin, scabies. If you are allergic to base metals, you can only wear laser-cut black gold. It is worth considering this point before buying.

Even in ancient times, it was believed that noble metals do not burn, do not deteriorate and can benefit people with various diseases. Chemical scientists were very interested in gold. Various compositions were made, ligatures (additional metals) were added. During the next studies, pieces of precious metal were mixed with mercury, copper and even with ordinary dust.

Black gold was discovered as a result of research. This color can be obtained using various processing technologies.

1. Electroplating. Rhodium and ruthenium are added to gold. The first provides blackness from the inside, but the surface still remains gray. This does not change the weight of the metal. Ruthenium allows you to make the product heavier and dye it more deeply.
2. Patination. A piece of gold is melted at a temperature of 670 ° C. Sulfur and oxygen are added to the alloy. The matter is non-liquid and instantly turns black. In the process of hardening, shine appears, and the color itself becomes deeper and more saturated.
3. Plasma compounds. At the time of gold deposition using the vapor phase, amorphous carbon is introduced into it. It does not corrode metal, but it changes weight. When cut, the material becomes porous, and the product itself becomes light. Jewelers do not like this technology, it is unprofitable. The blackening method itself is expensive, but the cost of the finished decoration is too low.
4. Oxidation. Careful infusion of cobalt will lead to an oxidative reaction. During it, the release of gold particles occurs. 75% of the precious material will remain in the alloy. When the substance is injected, the color also changes. Gold can turn gray or brown as a result.
5. Copper and potassium sulfide make it possible to obtain a heavy and hard precious metal of black color. If, after mixing, heat treatment is also carried out at a temperature of 700 ° C, then a shine will appear. If you heat it up to 950 ° C, and take titanium and iron as additives, an olive shade will appear, and the price of the finished product will increase by about 35%.

There is also a modern technology for creating black gold. She means laser use... As a result, nanostructures completely absorb color and become completely black.

It should be noted that not every jeweler is capable of using this technique. It takes a lot of knowledge and practice to master it. Years later, you will be able to learn how to create high-quality jewelry. Such black gold does not cause allergic reactions. True, its cost is quite high.

Black gold is used to make jewelry. Rings are especially common. Interestingly, the Cartier jewelry house has made a whole collection of watches with straps from an unusual material. Quite simply, black alloy works well with platinum and the rich color of regular gold.

Brave jewelers make extraordinary jewelry. The color and texture of black gold are pushing for experimentation. But there is no need to talk about the availability of such products. Black gold is expensive.

It should be noted that the material appeared relatively recently. It is possible that after a while cheaper and simpler methods of its creation will appear. Then the jewelry will become available, go out to the masses. In the meantime, items made of black gold often flicker on the stars, and even then not at all.

It should be noted separately that dark metal is also used to create men's jewelry. The black color is quite restrained and elegant, it goes well with the business style of clothing.Rings, rings and even tie pins are made of such gold. Black alloy jewelry belongs to the premium class and literally screams about the status of its owner.

Black gold combines well with many types of inserts. It is worth noting that even a small flaw in the stone will be noticeable in a product made of such material, and this is not very good. On a black background, any scratch, chip, or just asymmetry stands out much brighter than any other combination.

Once upon a time, black precious metal was combined only with diamonds and pearls of the same color. However, things are much more interesting today. Chinese jewelers use different color inserts and benefit from contrast. It should be noted that only precious stones will do. A simple piece of glass won't look pretty in a black gold frame.

Black gold is renowned for its strength, which distinguishes it from other types of this metal. But with careless handling, even on such a product, scratches and scuffs may appear, which will ruin the appearance. Simple guidelines will help you keep the original shine for a long time.

1. It is necessary to take off the products before visiting the pool and playing sports. It is impossible for black gold to be in water for a long time or rub against clothes, body.
2. Contact with aggressive chemicals should be avoided.
3. Precious metal can only be stored in a special box, in a case. All small parts and links must be straightened so that there are no creases.
4. Do not leave jewelry in the bathroom or kitchen. High humidity will result in a loss of gloss.
5. You can clean the jewelry only in a light soapy solution. Processing with a cloth made of soft material is acceptable. The use of brushes is strictly prohibited.

For even more interesting information about different types of gold, see the next video.