What is Lab Grown Diamond? How to Choose to Lab Grown Diamond?

If you used to be deterred by the high price of diamond, then you don't need them now because scientists have studied how to cultivate diamond! It not only has a high cost-effectiveness, but also avoids the exploitation of manpower during mining and drilling. Both Wonder Woman Gelgado and Sasha Jackson Emma Watson have worn "Cultivating diamond" on the red carpet, which shows that the new generation of women are more concerned about whether the earth can maintain sustainable beauty, thus redefining the eternal meaning of diamond.

1、 What is Lab Grown Diamond?

The technology of lab grown diamond in the laboratory' has been around for many years. lab grown diamond is to simulate the growth environment of natural diamond in the laboratory. A diamond seed is cultivated by HPHT high temperature and high pressure method or CVD chemical deposition method through high temperature and high pressure processing to make it grow continuously. Its chemical, physical, atomic, optical and other characteristics are the same as natural diamond, with the same visual effect, but the price is much cheaper than natural diamond. In 2018, the Federal Trade Commission (FTC) officially announced that diamond grown in the laboratory were real diamond. Matthew Hall, Vice President of the GIA Certification Body Association, also stated that the diamond cultivated in the laboratory are real diamond with the same optical, chemical, thermal, and physical properties.

There are two main manufacturing methods for lab grown diamond, one is the high-temperature high-pressure method (HPHT), and the other is the chemical vapor deposition method (CVD).

HPHT high-temperature and high-pressure diamond synthesis uses the principle of high-temperature and high-pressure to simulate the growth environment of diamond, which can also produce high-quality diamond. HPHT is a relatively traditional diamond cultivation method, which uses a special device in the laboratory to simulate the high-pressure and high-temperature environment (about 50000 atmospheric pressure, 1300-1600 ℃) during the formation of natural diamond deep in the Earth, and uses the carbon materials inside the device to manufacture and cultivate diamond.

CVD chemical vapor deposition method simulates the high-temperature and high-pressure environment formed by natural diamond in high-tech instruments, by igniting the methane gas in the container and continuously depositing carbon elements.

Regarding these two growth methods, it cannot be said which method produces better lab grown diamond. Both methods can synthesize high-quality lab grown diamond, and both methods will be graded for lab grown diamond. lab grown diamond and natural diamond have similar physical and chemical properties, and their appearance is basically the same. Especially for colorless lab grown diamond, they cannot be distinguished with the naked eye, and conventional gemstone inspection methods cannot distinguish them. Professional equipment is needed for investigation.

2、 About 4C Standard

Everyone knows to choose 4C when buying diamond, so which one is the most important in 4C, including carat weight, color, clarity, and cutting? Today, let's talk about the standards for choosing to lab grown diamond!

(1) About cut grade

Cutting is the second life of diamond, and good cutting can make diamond shine even more. The cutting of diamond can be divided into five levels, namely:


VG=Very Good


FR=Fair General



(2) About color

The order of diamond colors from white to yellowish is: from D to Z, DEF belongs to the transparent and colorless level, G to L is close to colorless level, and from K down, the diamond will gradually turn yellow. So when choosing diamond, at least choose diamond with an H color or higher.


(3) About clarity

The clarity is classified under a 10x magnifying glass, and the clarity grades can be divided into FL, IF, VVS1, VVS2, VS1, VS2, SI1, SI2, SI3, I1, I2, and I3 from high to low. When choosing, we can ensure that the naked eye is flawless, not lower than SI1. It is best to choose the VS level, and if the budget is sufficient, choose the VVS level.


(4) About carat

The weight of one carat of diamond is 0.2 grams, with a diameter of about 6.5mm. diamond with a weight of less than 1 carat can also be measured in units of "cents", such as 0.5 carat diamond being 50 cents diamond. When buying a diamond ring, we should not blindly pursue the size of the diamond, because a one carat diamond with poor clarity in cutting color will also look dull and lack fire color.

The most important thing to choose a diamond is to integrate the 4C of diamond. After reading these, you will know that when choosing to lab grown diamond, you need to choose large, transparent, and well colored diamond to bring you the greatest shine!

3、 Certificate for Lab Grown Diamond

Currently, GIA, IGI, and NGTC are the most authoritative certificates for lab grown diamond, with IGI certificate being the most common and mainstream certificates for lab grown diamond.

Firstly, the GIA Certificate, also known as the Gemological Institute of Amercia, is the founder of the commonly used diamond 4C standard appraisal system. Founded in New York, USA in 1931, it is a recognized authoritative non-profit research institution in the industry, renowned for its impartiality and independence in scientific research. It places great emphasis on maintaining its reputation in gemstone appraisal, and appraisal institutions around the world use the GIA standard as a reference, diamond with GIA certificate are recognized worldwide. The GIA certificate mainly displays the 4C level achieved by diamond in the GIA standard, and GIA issues a grading certificate for diamond with a score of 18 or above.

Secondly, the IGI certificate, fully named International Gemological Institute, was established in Antwerp, Belgium in 1975. It is currently the world's largest independent jewelry appraisal laboratory and gemological research and education institution, and has created the 3EX cutting evaluation system. This is also the internationally recognized standard diamond cutting grade evaluation method, and IGI has developed the world's first complete and comprehensive diamond cutting rating table, This has also become the prototype of modern diamond cutting system evaluation standards. IGI has laboratories and schools in major diamond trading centers and central cities around the world, and gemologists from over 96 countries worldwide receive IGI's laboratory and educational research services. It is known as the "authoritative appraisal agency around consumers".

Thirdly, the NGTC certificate, fully known as the National Gemological Training Centre, is the only partner of the Gemological Institute (GIA) in mainland China. Belonging to the Jewelry and Jade Jewelry Management Center of the Ministry of Land and Resources, we have been committed to promoting and popularizing jewelry vocational education and national jewelry and jade standards for a long time. NGTC can not only inspect bare diamond, but also inspect inlaid diamond jewelry such as diamond bracelets, etc.

No matter what certificate you choose, when buying lab grown diamond, you should look and ask more. The certificate and waist size should be aligned, and you must watch photos and videos of color cards.

4、 About the Price of Lab Grown Diamond

Lab grown diamond only requires a 30% to 50% discount on the retail price of natural diamond. For example, For example, at a price level, you cannot buy a natural diamond ring for 30 cents, but you can buy a lab grown diamond ring for 1 carat. Overall, purchasing lab grown diamond is relatively cost-effective, and under the same budget, large and shiny diamond can be purchased.

5、 About Messi Jewelry

Wuzhou Messi Gems Co., Ltd specialized in manufacturing and selling lab grown diamond and lab grown diamond Jewelry. We output 1,000 carats IGI certified Lab Grown diamond Monthly. We have IGI Polished Diamond Grader as well as professional and experienced diamond sales team. Your designs and specifications for OEM or ODM are warmly welcome.

Our customers are all over the United States, Europe, Russia, Brazil, and Australia. We exhibit at Las Vegas JCK in the United States, Inhorgenta Munich in Germany, Hongkong International Gems Fair, and Shanghai exhibition every year. Our team has extensive experience in foreign trade sales, and has won praise from customers from all over the world for its excellent quality and service.


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