All About Metal Black Gold

Many are used to the fact that gold is yellow, white, pink and red. However, in 2001, the world learned about an unusual black metal. It was first shown at Basel. Products from such material are quite expensive and unusual. Alloying such gold is done in the Fawaz Gruosi jewelry house according to a secret recipe, however, there are also known ways to obtain it.

Pure gold is only yellow. Getting any other color is due to additives. Black gold is composed of 15% cobalt and 10% chromium. The metal looks quite unusual and attractive.

The resulting material belongs to the group of intermetallic compounds. It is difficult to process, it is unyielding during melting and forging.

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

The degree of coloring can vary from gray to charcoal black. The metal may have a shade of green or blue. These effects are achieved by introducing additional materials into the alloy. It is worth noting that on products made of black gold there is always the 750th test. This is due to the proportions of the components to obtain the desired shade.

The unusual color on such jewelry is achieved by rhodium. Over time, the coating may wear out and lose its appeal. The decorative layer will have to be updated from time to time.

Black gold in jewelry is not very popular. An 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 black gold that has undergone laser treatment. It is worth considering this point before buying.

Back in ancient times, it was believed that noble metals do not burn, do not deteriorate, and can benefit people with various diseases. Gold was very interested in chemical scientists. Various compositions were made, a ligature (additional metals) was added. In subsequent studies, pieces of the precious metal were mixed with mercury, copper, and even 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. The weight of the metal does not change. Ruthenium allows you to make the product heavier and color 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. Matter is non-liquid and instantly turns black. In the process of solidification, shine appears, and the color itself becomes deeper and more saturated.
3. Plasma compounds. At the time of deposition of gold using vapor phase, amorphous carbon is introduced into it. He does not corrode metal, but changes weight. At cross section, the material becomes porous, and the product itself becomes light. Jewelers do not favor such a technology; it is disadvantageous. The blackening method itself is expensive, but the cost of the finished decoration is too low.
4. Oxidation. A careful infusion of cobalt will lead to an oxidative reaction. During it, gold particles are released. 75% of the precious material will remain in the alloy. When the substance is infused, the color also changes. Gold may turn gray or brown.
5. Copper and Potassium Sulfide make it possible to obtain a heavy and hard black precious metal. If, after mixing, heat treatment is also carried out at a temperature of 700 ° C, then a shine will appear. If you heat up to 950 ° C, and take titanium and iron as additives, then 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 implies using a laser. As a result, nanostructures completely absorb color, become completely black.

It is worth noting that not every jeweler is able to work in such a technique. To master it requires a lot of knowledge and practice. Over the years, it will be possible 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. Especially often you can see the rings. Interestingly, Cartier jewelry house made a whole collection of watches with straps from unusual material. Everything is quite simple, the black alloy goes well with platinum and the rich color of ordinary gold.

Bold jewelers make extraordinary jewelry. The color and texture of black gold are pushing for experimentation. That's just the availability of such products is not necessary. Black gold is expensive.

It is worth noting that the material appeared relatively recently. It is possible that, over time, cheaper and simpler methods of creating it will appear. Then the jewelry will become available, go to the masses. In the meantime, products made of black gold often flash on the stars, and even then not on all.

Separately, it is worth noting that dark metal is also used to create men's jewelry. Black color is quite restrained and elegant, goes well with the business style of clothing.Rings, rings and even hairpins for ties are made of such gold. Black alloy jewelry belongs to the premium class and literally shout about the status of its owner.

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

Once black precious metal was combined only with diamonds and pearls of the same color. However, today everything is much more interesting. Chinese jewelers use inserts of different colors and benefit from contrast. It is worth noting that only precious stones will do. A simple glass will not look beautiful framed in black gold.

Black gold is famous for its strength, which distinguishes it from other types of this metal. But with careless handling, even on such a product, scratches and abrasions can appear that will ruin the appearance. Simple recommendations will help to maintain the initial gloss for a long time.

1. It is necessary to remove products before visiting the pool and playing sports. Black gold must not be in water for a long time or rubbed against clothing, body.
2. Contact with harsh 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 the decoration in the bathroom or in the kitchen. High humidity will cause loss of gloss.
5. You can only clean jewelry in a light soapy solution. Processing with a soft cloth is acceptable. The use of brushes is strictly prohibited.

See even more interesting information about different types of gold in the next video.