What Is A CVD Diamond?

What Is A CVD Diamond?

The CVD diamonds are diamonds grown in the laboratory to replicate natural diamonds. CVD diamonds are as authentic as natural diamonds since they have the same optical, chemical, and physical properties. It is almost impossible to tell them apart without a professional's help. The lab-grown diamonds are exquisite, beautiful, affordable, and durable, which is why they have garnered so much popularity.

CVD is a process called Chemical Vapor Deposition, which involves breaking down natural gas such as methane into carbon atoms to form new diamonds. The second of the two laboratory processes is the High-Pressure High Temperature (HPHT).

Characteristics Of A CVD Diamond

  • Their optical, chemical and physical properties are similar to those of natural diamonds.
  • They have a durability of 10 on the Mohs Scale of hardness.
  • Just like natural diamonds, the 4Cs of quality also apply.
  • They have inclusions just like natural diamonds, and it is rare to find a flawless CVD diamond.
  • Professional laboratories such as GIA note the origin of the diamond upon certification.

History Of CVD Diamonds 

General Electric created the first lab-grown diamond in 1954. It was a year after the first patent for CVD diamond was issued. People met this first gem with great criticism, and verification of the reports stalled for many years. The first creation of real CVD diamonds was in the 1980s by DeBeers, a while after they bought the HPHT technology from General Electric.

How CVD Diamonds Are Made

  • The first step is selecting a thin diamond seed and placing it in a sealed chamber.
  • The second step is flooding the chamber with carbon-rich gas while heating it to around 800°C.
  • The gas ionizes, producing carbon.
  • The third step is bonding the carbon molecules with the original diamond seed.
  • The next thing is to continue with the process until the formation of the diamond is complete.

Methods For Identifying A CVD Diamond

You can use the following tools to identify a CVD diamond:


It is used to observe the chemical structure and patterns of the stone.

Diamond View machine

This machine uses heavy ultraviolet light, which turns dark red when observing a CVD diamond.

Diamond tester

The tester checks a diamond's electrical conductivity.

Ultraviolet lamp

The lamp produces a blue light if you are identifying a CVD diamond.

Grading And Certification Of CVD Diamonds


CVD diamonds are graded by certified labs such as GIA and IGI. They use the 4Cs of quality just like natural diamonds, which determine the value and price.


The certified labs certify the graded diamonds and encode a unique code at the stone's girdle using a laser imprint. The information regarding the diamond's grading and origin can only be seen by employing high magnification. The code is also noted on the diamond's digital/paper certificate. 

Pros And Cons Of CVD Diamonds

The Pros

  • Cheaper than natural diamonds.
  • They are free from conflicts such as human rights violations, labor violations, and child rights violations.
  • They are available in a variety of sizes, colors, and shapes.
  • They are environmentally friendly because they do not involve mining.
  • They have scintillation, brilliance, and fire.
  • Take less time to grow, about 6-8 weeks, whereas mining of natural diamonds could take months.

The Cons

  • They are scarcely accessible.
  • When compared to natural diamonds, they are less durable.
  • Many brands don't sell them.

Where To Buy A CVD Diamond

When buying a CVD diamond, it is essential to ensure that it is properly graded, certified, and encoded. Ensure you buy from a trusted expert who will also provide a certificate. At Lesley Ann Jewels, we have a variety of CVD diamonds for your rings, pendants, bracelets, and earrings of your desire. Contact us for an order today!