There are various ways to find out the color and quality of a diamond. One of these is to look for its internal and external flaws. Another way to identify the color is to check whether the stone is colorless or fancy-colored.
Colorless vs fancy-color
Colorless and fancy color diamonds are two types of gemstones. Both are durable, gorgeous, and eye-catching. They are found in a variety of colors, shapes, and sizes. But the differences between the two can be confusing.
First, the definition of “fancy” is a bit different. It is not the cut of a diamond, but rather the distribution of its colors. Fancy color diamonds are more rare and expensive than their colorless counterparts.
Fancy colors are usually formed by carbon seeds absorbing the molecular structure of high temperatures. This process gives them their distinctive colors. A carbon seed that has absorbed the molecular structure of boron will result in a blue diamond.
Internal blemishes
The internal blemishes in HPH diamonds are very different from the blemishes on the surface of the diamond. These blemishes are usually a result of improper storage or wearing. They can also be the result of the HPHT process.
During the HPHT process, a diamond is heated. A process developed by General Electric, this procedure is used to remove color from certain diamond grades. It is sometimes called fracture-filled diamonds. GIA does not grade these diamonds.
Aside from the fact that the hpht diamonds process removes the color of the diamond, it also claims to repair the crystal lattice. This treatment is used in conjunction with other treatments.
When looking at a diamond under ten times magnification, flawless diamonds are free of blemishes. The inclusions that are visible will determine the grade.
VS1/VS2 range
One of the most important factors in determining a diamond’s value is the clarity grade of the stone. The VS1 and VS2 ranges of HPHTH diamonds represent the best of the best in terms of clarity.
These diamonds are also known as “eye clean” diamonds. This is because the inclusions are usually small and can’t be easily seen by the naked eye. However, they are easier to detect under magnification.
VS2 diamonds can cost between a few cents per carat to over twenty five percent more than a VS1 diamond. As such, they are more affordable and can be an excellent investment. But there are a few things you should know before buying one
Grow at diamond growth seed
There is a lot of information out there on the subject of diamond nucleation. Several groups have devoted a considerable amount of effort to this study over the last few decades. Among the techniques that are frequently used are the BEN and electrostatic seeding methods.
The BEN method is the most common technique used to grow epitaxial diamond layers on non-diamond substrates. The technique involves the use of a gas mixture of oxygen and acetylene to heat the surface to 1000°C. After growth has taken place, the methane flow is terminated.
Electrostatic seeding by diamond nanoparticles is a popular technique for nanocrystalline diamond growth. This method is suitable for many substrates and is effective on surfaces with rough topography.
Aggregate into pairs
HPHT diamonds are synthetically created diamonds that have undergone an oxidation process. This oxidation helps to enhance the brightness of the diamond and may also improve the biocompatibility of the diamond.
HPHT processed diamonds are typically less expensive than untreated diamonds of the same color/clarity combination. The process is performed at temperatures designed to approximate the formation of natural diamonds. A key feature of the HPHT process is that the diamonds do not incorporate hydrogen in the growth process.
Conclusion
HPHT synthetics are available in a range of colors, from yellow to blue. They can display light blue phosphorescence. Most HPHT synthetics are either type Ib or type IIb, but some of them are a mixture of both types. The occurrence of a nitrogen peak at 1344 cm-1 is a characteristic that indicates a type Ib or type IIb diamond. Nitrogen peaks at 1175 and 1282 cm-1 are indicative of a B centre.
