How to Compare HPHHT Vs CVDS Diamonds

When comparing diamond quality, it is important to understand the difference between hpht vs cvd. This article will discuss the difference between the two processes, as well as the costs involved. In addition, you will learn about the Blue nuance of both types of diamonds. After reading this article, you will be able to select the best diamonds for yourself. Whether you purchase a diamond by CVD or HPHT will ultimately depend on your budget.

hpht vs cvd

Currently, there is no clear-cut winner when comparing CVD Vs HPHT when it comes to producing diamonds. However, the two processes do have some important differences. For example, diamonds produced with HPHT grow in a cuboctahedron shape, with 14 growth directions, while diamonds made with CVD grow in a cubic shape. Both methods yield diamonds that are colorless and translucent, although diamonds produced with CVD are much less expensive than diamonds created through HPHT.

The main difference between the two diamond creation methods is the process of creation. Unlike natural diamonds, which are formed naturally, HPHT and CVD diamonds are lab-grown. While these two techniques do not produce a noticeable difference in optical properties, their creation process does affect their clarity, color, and overall quality.

In general, both methods yield beautiful diamonds that are almost identical to their earth-grown counterparts. However, the differences between these two methods may not be so easily identified without professional help.

Cost of each process

The cost of 9 HPHHT vs CVDS varies by process. The two techniques use different processes, so it is important to choose the right one for your needs. CVD is a more cost-efficient method, but it can introduce unwanted point defects. HPHHT can avoid these problems by using an in situ d-doping process.

The HPHT process improves the color of natural diamonds by up to a few shades. It can also enhance the color from yellow to colorless. However, natural diamonds in the M-K range have a tendency to have a brown tint. In such cases, you should try to sell them for a lower price.

Another method, known as CVD, is a newer method. This method uses less heat and pressure to create diamonds. This technique uses carbon-based gases to grow diamonds. The process starts with a diamond seed, which is usually a narrow slice of a diamond. Then, the carbon atoms combine and form diamond crystals.

Blue nuance of hpht vs cvd diamonds

HPHT diamonds do not have the blue nuance that CVD diamonds have. Instead, they are clear and free of strain lines. The blue nuance is the result of impurities, such as boron. During the HPHT process, boron is reduced to a small amount, thereby reducing the risk of excess boron.

A lab-grown diamond with blue nuance is often difficult to detect. The undertone is unnatural and not visible to the naked eye. You cannot ignore it, even if the diamond looks beautiful in a 360-degree video on an ecommerce web site. The color and tone of videos are often manipulated to hide the blue nuance.


As a rule, people prefer diamonds with no blue nuance. However, there are some exceptions to this rule. Because most CVD diamonds are treated after growth, they are less likely to show blue nuance. However, diamonds with less color are not necessarily harder to sell compared to diamonds with a clear colorlessness.

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