02

What is the color grade for colorless diamonds? To assess their quality and value, all diamonds are assigned a color grade. Even colorless diamonds are graded on a scale from completely colorless to slight yellow tints. The Gemological Institute of America (GIA) has established an international color set based on letters. The highest valued, purest, and rarest diamonds are colorless and are labeled D, E, or F. If you are planning to invest in a loose diamond, it is recommended that you choose a diamond with a high degree of colorlessness and clarity. Diamonds graded between colorless and Z often exhibit slight tints that are usually only visible under a microscope. Diamonds with the lowest grades and slight yellow tints are labeled S to Z. It is important to note that a slight yellow tint does not mean that the diamond is actually yellow. A diamond must be completely yellow to be considered a fancy colored diamond, which means that it is a diamond that has been chemically changed to a different color. In the past, names such as Jager (D), Wesselton (H) or Lop Cape (N) were used to indicate international colour grades, but these have been replaced by letters to allow for a uniform and international comparison of the quality of diamonds.How are coloured diamonds graded?In addition to colourless and slightly tinted diamonds, there are also coloured diamonds, such as brown, orange, pink, blue, red and green diamonds. Diamonds that retain their colour through a chemical reaction are called "Fancy Coloured", as stated on the diamond certificate.Coloured diamonds are extremely rare, only 1 in 10,000 diamonds shows a natural colour. The most common colours are brown and yellow, while green, red and blue are extremely rare.Coloured diamonds are also graded based on the 4 C's. The colour grade varies from "Faint" for the least coloured diamonds to "Fancy Deep" for diamonds with an intense and deep colour saturation. There are nine grades based on color, saturation, and the type of gemstone. Diamonds with vibrant colors are not only rare, but also very valuable, making them excellent investment opportunities. In addition to diamonds, you can also invest in natural colored gemstones such as emerald, ruby, or sapphire. It is important to remember that a red diamond is not the same as a red ruby, as they are two different gemstones with their own characteristics, qualities, and pricing based on the 4 C's.

04

What is the role of the cut quality in a diamond? The cut is the most crucial factor of the 4 C's that determines the quality of a diamond for both jewelry and investment purposes. It is also the only human intervention that can affect its value. Cutting a rough diamond into different facets gives the gem its unique brilliance. The more facets that are created during the cutting process, the better the diamond can reflect light and the more it will shine. How is the specific cut of a diamond achieved? The cut refers to the proportions of the different parts of the cut diamond, the symmetry and the degree of brilliance. The pavilion of a diamond should not be cut too deep or too shallow, as this affects the quality of the light reflection. A poorly cut diamond can lead to light loss or dark areas in the stone. In a well-cut diamond, almost all of the light will shine out through the crown, the top part. The size of the table, the flat surface at the top, varies depending on the cut. The cut of the table can make the diamond appear larger. The girdle, the edge on the side of the diamond, contributes to the strength of the gemstone and can vary from extremely thin to extremely thick. At the bottom of the diamond is a facet called the culet. Since a diamond does not have a point but a tiny flat bottom, a perfectly cut culet contributes to the brilliance of the diamond and prevents light from escaping from the bottom.