Synthetic diamonds and lab-grown diamonds basically represent the same thing. There are other terms such as "artificial diamond", "artificial diamond", and "cultured diamond", but they are basically the same. Unlike simulants (which look like diamonds) such as cubic zirconia, moissanite, and crystal, they are "real diamonds" with the same chemical properties as natural diamonds.

Neither is wrong. However, because the word “synthetic” possible to give the impression of being fake, it is common to use lab-grown diamonds worldwide. The world's authoritative diamond appraisal institutions such as "GIA", "IGI", and "HRD" all use the name of Laboratory Grown Diamond, and most of the companies and brands use the Lab Grown Diamond name.

Since both lab-grown diamonds and natural diamonds are the same substance in which carbon is crystallized, it is basically impossible to distinguish them by visual observation (naked eye, loupe, microscope, etc.). However, in rare cases, both lab-grown diamonds and natural diamonds have some characteristics, and it is possible to distinguish them by observing their appearance based on the type and shape of inclusions. However, for high-quality diamonds, even a professional diamond grader cannot tell the difference between a lab-grown diamonds and a natural diamonds.

Unlike lab-grown diamonds, more than 98% of natural diamonds contain nitrogen as an impurity, which is used for rough sorting. Nitrogen-containing diamonds do not transmit ultraviolet rays around 250 nm, while those that do not contain nitrogen do. Therefore, it is possible to distinguish the presence or absence of nitrogen content by ultraviolet transmission. Nitrogen-containing colorless diamonds are 100% natural diamonds. Nitrogen-free diamonds can be rare natural diamonds or lab-grown diamonds. Anyhow it is possible to finally determine whether a diamond is a natural diamond or a lab-grown diamond but by inspection using multiple inspection equipment such as FT-IR (infrared spectrometer) and observation under ultra-short-wave ultraviolet environment.

A simple diamond checker on the market is designed to judge whether a diamond is a diamond or a simulant based on the thermal conductivity of the diamond. Natural diamonds and lab-grown diamonds are the same material and have the same thermal conductivity, so it cannot be distinguished by commercially available diamond checkers. In addition, since the thermal conductivity of diamond and moissanite is very close, diamonds are possibley rarely labeled as moissanite, but diamonds and moissanite are distinguished by a combination of several tests even at gem lab. It is dangerous to believe easily just because it is displayed as moissanite on a commercially available diamond checker.

All "colorless" lab-grown diamonds are Type 2. All lab-grown diamonds with colors above J and K are Type 2. Yellowish lab-grown diamonds are classified as Type 1b, while blue lab-grown diamonds are classified as Type 2b because they contain boron.

There is no absolute advantage over one or the other. High-quality lab-grown diamonds grown using advanced technology have almost no superiority or inferiority, whether they are CVD or HPHT. However, depending on the size, shape, and grade of diamonds, there are pros and cons for production efficiency, so depending on the category, one of the growth methods may have a large market volume or a high price advantage. On the other hand, lower-quality diamonds may have their own characteristic inclusions, and may also show the color of the diamond itself or interference patterns under certain light sources. Also, while all colorless CVD diamonds are classified as Type 2a (contains no impurities), some HPHT may be classified as Type 2b (contains boron as an impurity).

There is no absolute advantage over one or the other. High-quality lab-grown diamonds grown using advanced technology have almost no superiority or inferiority, whether they are CVD or HPHT. However, depending on the size, shape, and grade of diamonds, there are pros and cons for production efficiency, so depending on the category, one of the growth methods may have a large market volume or a high price advantage. On the other hand, lower-quality diamonds may have their own characteristic inclusions, and may also show the color of the diamond itself or interference patterns under certain light sources. Also, while all colorless CVD diamonds are classified as Type 2a (contains no impurities), some HPHT may be classified as Type 2b (contains boron as an impurity).

The market for lab-grown diamonds has been established relatively recently, and there is no secondary distribution market yet, so it is sometimes said that there is no asset value. As the market for lab-grown diamonds expands, it is believed that a secondary distribution market will be formed in the future. Lab-grown diamonds, which currently do not have a secondary market, also have the advantage that almost all diamonds sold are virgin diamonds. In addition, even natural diamonds that can be called asset value are limited to particularly large diamonds and fancy color diamonds with high rarity. If you try to sell a general diamond purchased at a regular jewelry store, it will be about 30% of the purchase price. Considering that equivalent lab-grown diamonds can be purchased for about 1/4 of the price of natural diamonds, the cost performance of lab-grown diamonds surpasses natural diamonds even if consider about terms of natural diamond's cashability. The value of both natural and lab-grown diamonds, except those specifically sold as asset value, is determined by the wearer as a piece of jewelry, or by the psychology of the giver and receiver of the gift. Since it is a physical thing, it is considered that the liquidity is only secondary.