Eight Questions About Lab-grown Diamonds

Eight Questions About Lab-grown Diamonds


Q: Is custom lab-grown diamond color now possible? Such as cultivating pink diamonds, green diamonds…

Answer: For consumers, they can request and customize the color of laboratory-grown diamonds when purchasing.

For merchants, some colors (such as cultivated yellow diamonds) can be produced during the cultivation process, but some colors (such as cultivated pink diamonds) cannot be produced in large quantities during the cultivation process with the current technology, and need to go through some later stages. Optimize the processing technology to improve the color and meet the customer’s requirements.


Q: What is the market price of lab-grown diamonds of the same quality by different methods? How much cheaper than natural diamonds? Has big brand jewelry started to use lab-grown diamonds?

A: Regarding the price of lab-grown diamonds: Ten years ago, the retail price of lab-grown diamonds used to be 70% of that of natural diamonds, but it dropped to 50% later.

Among them, for large-grained diamonds, the price difference between natural and cultivated diamonds is larger; while small-grained diamonds are used in large quantities, even if the price difference between natural and cultivated diamonds is not large, the final result is still considerable.

Now, with the improvement of technology, the prices of grown diamonds of various sizes and colors are more standardized. At major jewelry exhibitions, merchants of laboratory grown diamonds will provide complete quotations.

Jewelry brands currently using laboratory-grown diamonds include Debeers (secondary brand: Light Box), Swarovski, etc.


Q: Why can’t diamonds grown by HPHT high temperature and high pressure method pass the test of the drill pen?

A: The probability of this happening is very small.

Under normal circumstances, laboratory-grown diamonds and natural diamonds are identical in physical properties and chemical composition, and have good thermal conductivity. Therefore, HPHT high-temperature and high-pressure method-grown diamonds, like natural diamonds, can pass the test of the drill pen. Drilling pens are not a way to tell the difference between lab-grown and natural diamonds.

The instrument accuracy of the drill pen also needs to be considered.


Q: Why doesn’t Sumitomo produce gem-grade lab-grown diamonds?

Answer: It is not that Sumitomo cannot produce gem-quality lab-grown diamonds.

It’s just that Sumitomo started to produce lab-grown diamonds earlier (in the 1980s), and the technology at that time was unable to provide stable production of a large number of gem-grade lab-grown diamonds. In the evaluation several years later, Sumitomo has been able to produce gem-quality lab-grown diamonds.

In addition, the purpose of the research and development of the early cultured diamonds itself was industrial demand, and it was only applied to jewelry in the later period.


Q: Do lab-grown diamonds issue certificates? Are there also 4C standards?

A: Lab-grown diamonds can issue the same 4C grading report as natural diamonds. IGI International Gemological Institute is the first authoritative international laboratory to issue laboratory-grown diamond grading reports.


Q: There are so many pink diamonds, yellow diamonds, and even green and blue diamonds on the market. The prices are not very high, are they cultivated + irradiated diamonds?

Answer: First of all, there are various reasons that affect the price of diamonds, such as the difference in the clarity grade and cut grade of diamonds, especially for colored diamonds, the difference in color grade will cause price differences.

Secondly, regardless of whether it is a laboratory-grown diamond or a natural diamond, optimization treatments (such as: irradiation color change, high temperature and high pressure color change) can be optimized to change the original body color of the diamond. If you are worried about such risks, it is recommended to look for colored diamonds with authoritative certificates when choosing. (For example, diamond grading reports issued by large testing institutions such as IGI International Gemological Institute will mark optimized diamonds)


Q: With the development of lab-grown diamond technology, will the price of lab-grown diamonds get lower and lower? Will lab-grown diamonds hold value in the future?

Answer: With the development of science and technology, the technology of laboratory-grown diamonds will be more perfect in the future. At that time, it is believed that the price system of laboratory-grown diamonds will be more open and transparent.


Question: What are the concerns of domestic merchants and consumers in selling or buying lab-grown diamonds?

Answer: For merchants, how to quickly explain to consumers the differences and differences between laboratory-grown diamonds and natural diamonds, and to make consumers fully accept laboratory-grown diamonds is still a big problem, but with the increase of tolerance As a result, consumers’ acceptance of laboratory-grown diamonds is indeed getting higher and higher. Of course, some consumers have doubts about the value preservation of laboratory-grown diamonds.

Lab-grown diamonds have a similar appearance to natural diamonds, which also makes some consumers worry about whether merchants may apply natural diamond grading reports when selling lab-grown diamonds.More you can read this article Lab-Grown Diamonds vs Moissanite

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