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What are Synthetic Diamonds?

Mary McMahon
Updated May 21, 2024
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Cultured or synthetic diamonds are gems that are grown in a laboratory over the course of several days, rather than formed under the Earth in a process which takes millions of years. Although some consumers dismiss these stones as fake, they are in fact chemically identical to conventional diamonds. Because a laboratory environment allows for great control, synthetic diamonds have the potential to be of a much higher quality than those mined from the earth. They are less likely to have inclusions, and many fancy diamonds are synthetic, because the process allows for the easy introduction of impurities that will create a rich color.

The first synthetic diamond was created in 1893 by Henri Moissan, using a high pressure, high temperature process. By heating and compressing carbon, he successfully created an artificial diamond, although it was rather small. This industrial process is now widely used in many laboratories around the world, although gem quality stones tend to be made using a chemical vapor deposition process. These diamonds are grown in a low pressure environment with the use of a substrate for the gem to grow on.

Industrial manufacturing has taken advantage of the stable quality of synthetic diamonds for several decades. Like conventional diamonds, they are extraordinarily strong, and can be used to cut through a wide variety of materials, or integrated into drills and grinders. The electronics industry is also interested in the potential uses for diamonds as semiconductors. Most large manufacturers are focused on supplying the need for industrial diamonds, rather than gems.

Gem quality synthetic stones are also growing in popularity. For consumers concerned about blood or conflict diamonds, they are an excellent alternative choice to conventional diamonds. In addition, synthetics tend to be cheaper and offer a wider range of color options, carat sizes, and cuts. Currently, these diamonds are usually clearly identified at the time of sale, and some diamond grading companies will not grade them, although they will provide basic data about the stones, such as their cut, carat size, and color.

Synthetic diamonds should not be confused with fake diamonds, such as cubic zirconium. Fake diamonds are made from substances that resemble diamond, but do not have the same mineral properties, structure, and chemical formula. Although false diamonds can be perfectly appropriate for some jewelry, they are not used in industrial processes because they lack the strength of true diamonds. While it may be difficult to tell the difference between a synthetic and a natural diamond, it is very easy to identify false ones under a jeweler's loupe.

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Mary McMahon
By Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a BeautyAnswered researcher and writer. Mary has a liberal arts degree from Goddard College and spends her free time reading, cooking, and exploring the great outdoors.

Discussion Comments
By anon329110 — On Apr 08, 2013

Is it be possible to have clear (Pure white /color less) synthetic diamonds?

By anon152324 — On Feb 13, 2011

There are two major manufacturers for synthetic diamonds: gemesis and apollo. Gemesis does yellow I believe, but I think Apollo does do them. You can also consider simulated diamonds, which are not chemically the same as a diamond or synthetic one, but have the exact same (or even better optical) qualities. Eco Diamonds seem to have good simulated gems that celebrities use.

By anon1195 — On May 20, 2007

Are clear synthetic diamonds available?

Mary McMahon
Mary McMahon

Ever since she began contributing to the site several years ago, Mary has embraced the exciting challenge of being a...

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