What's the best color for diamonds?
In fact, there is no standard. Among Cape series diamonds, the most colorless and transparent diamond is the rarest and most precious, and it is also the brightest and the best visual effect after cutting. However, some people like yellow and champagne diamonds, and naturally feel that yellow is good. So judging by personal preference, it's hard to say which color of diamond is the best. However, the color of diamonds is represented by the English letter D-N. D-class diamonds, which are colorless diamonds, are extremely rare and are the best colors.
The most common is almost colorless white diamond. However, nature occasionally produces colored diamonds with tones. Because they are brightly colored and extremely rare, the price is much more expensive.
Three series of diamond colors
Cape series: including colorless, light yellow to yellow diamonds;
Brown series: including brown diamonds with different strengths;
Color series: including pink, purple, gold, blue, green and other diamonds.
Most gem-grade diamonds belong to the colorless-light yellow series in Cape series. The whiter the color, the rarer and more precious it is, and the higher its value is.
When identifying the color of diamonds, the identified diamonds are compared with a set of international standard colorimetric stones, and the colors of the standard colorimetric stones are arranged from colorless D (the highest grade) to yellow Z in turn. ..
In fact, the color of a diamond depends entirely on personal preference. In addition, to judge the quality of a diamond, besides the color, we should also pay attention to the clarity, carat weight and cutting.
How is the color of diamonds formed?
Scientists have studied diamonds from different mines in the world and found that the formation conditions of diamonds are generally 4.5 ~ 6.0 GPA, which is equivalent to the place where they are produced reaching 150 ~ 200 kilometers below the surface, and the required temperature is generally 1500 degrees Celsius, with different levels, and some can be as low as1kloc-0/00 degrees Celsius.
The crystal structure of diamond is graphite layer by layer, which can make it grow continuously. When the crust changes and a volcano erupts, diamonds growing deep underground can reach the surface through the eruption process. Therefore, magma is not the matrix of diamond, but the carrier of diamond, which is the transportation belt of diamond.
When visible light passes through a diamond, the gem will absorb the light with a specific wavelength and reflect the rest of the light to the eyes of the observer. This process is called selective absorption. The color of all substances and diamonds depends on the selective absorption of light by objects.
If an object absorbs little or no spectral color, it will appear colorless or white. If the color of the whole spectrum is absorbed, the object is black. There are infinite color possibilities between black and white.
In other words, it is selective absorption that determines the color of your diamond. In diamond, the existence of nitrogen atoms (or other impurities) determines the ability of diamond to absorb wavelength, and therefore determines the color of diamond. Because the dog's eyes process wavelengths differently from humans, the color of the diamond it sees will be very different from yours.
Dislocation of carbon atoms or internal lattice deformation. The higher the plastic deformation, the darker the brown color. Including true plastic deformation and irreversible permanent deformation. It can be said that such deformation is a defect of crystal structure, but red, pink and brown diamonds are produced from it, which makes people have to sigh the magic of nature.