What are CVD diamonds?

A CVD diamond is a type of lab grown diamond that is made in an environment artificially created to satisfy certain specific needs. CVD stands for Chemical Vapour Deposition, the process through which these incredible synthetic stones are made.  CVD diamond manufacturers in India are known for their expertise in creating quality CVD diamonds and exporting them to faraway lands. Today, India has become the hub of lab grown diamonds providing a wide variety of this specific type of artificial diamonds.


How does a CVD diamond turn out to be special?

A CVD diamond is known for its exceptional material properties that make it stand out from the lot. Unlike the other set of synthetic gemstones such as HPHT diamonds, these are used in a wide variety of applications such as high power electronics, radiation detection, water treatment, consumer radio, medical diagnostics, and many more such relevant areas. The characteristics of these diamonds make them suitable not just for fashion but also for many significant fields that involve research and studies.

Are CVD diamond as real as a natural diamond?
Are CVD diamond as real as a natural diamond?

Are CVD diamonds as real as natural diamonds?

Being artificial diamonds, there often comes up a question where CVD diamonds are real. They are real as natural polished rough stones, having the same physical, chemical, and optical properties. CVD diamonds can be used in the place of natural ones without any hesitation. In fact, artificial gemstones are known to be of higher quality than polished natural rough stones as they are made under strict supervision with measurements and clear-cut instructions that are followed to bring out the perfect diamonds that can be made.

Both natural diamonds and lab grown diamonds have their very basic elements the same. Both are made of carbon. Hence, the ultimate result is the developed form of carbon, thereby giving the same result. When natural ones take thousands of years to complete their form, their synthetic counterparts are made within a few weeks. The only difference here is the mode of origin. Everything else from the structure to design will be so similar that even experts cannot tell them apart. Due to this, CVD diamonds are slowly replacing the natural rough stones in every arena. From jewelry to polishing, these lab grown diamonds have proved their worth and credibility.

How is a Chemical Vapour Deposition diamond made?

The making of a CVD diamond is an intensive process. Over the years, as technology became more advanced, research on these lab-made stones also increased. Their quality rose with time and so did the varieties in them. With studies and developments still happening in the field, it is believed that with the next few decades these artificial diamonds will expand their range in terms of color, size, and clarity.
Unlike HPHT diamonds, these require less temperature and the procedure is different.

What is Chemical Vapour Deposition?

Chemical Vapour Deposition is a balancing act between the stability of two carbon allotropes (sp2 & sp3). Apart from carbon, hydrogen also plays a role in the formation. But, both take different forms during the process. While carbon is made to transform into its plasma form, thermal dissociation of hydrogen is what ensures that the procedure happens the right way.

Chemical Vapour Deposition happens inside a chamber that is a vacuum. A diamond seed which will be a small piece of diamond or graphite will be kept inside the highly vacuumed chamber which will be filled with carbon and one other gas. It can be either hydrogen or oxygen.

The gas used will therefore be carbon-rich. After this, the temperature is made to rise inside the chamber. It may rise up to 2000 degrees Celsius depending upon the method used. At this stage, the heat acts upon the carbon turning it into its plasma form. This makes the carbon turn into particles that stick to the surface of the seed in layers. This leads to the seed becoming bigger with time. After the procedure, the diamond is cooled to solidify itself.

There are two ways in which the needed heat can be raised inside the chamber: ionized plasma or using heating gases. For thermal heating, a filament is placed inside the chamber to raise the temperature to 2000-2500. The most common method is ionized plasma which is completed using lasers or microwaves and temperature goes up to 500-1000 degrees Celsius. Other than these the heat can also be transferred using radio frequency, chemical reactions, plasma jet, oxy-acetylene flame, arc discharge, or direct current.

As simple as it may seem, it is not that easy a process. For the layering on the seed to happen, there needs to have a conducive environment that ensures a stable carbide formation. When compared to HPHT diamonds that grow in cuboctahedron shape in 14 directions, CVD diamonds tend to take the cubic form of growth in one direction.

Why are these diamonds said to be the purest among the lot?

CVD creates beautiful stones that are categorized as TypeII A. This category is found very rarely in nature. When created in an artificial environment they are completely guilt-free and clarity is top-notch. Being free from boron or nitrogen impurities these are the most chemically pure among all types. Hence they have a slight edge over HPHT diamonds. However, in terms of chemical and optical properties, both are the same.


What is the history of CVD diamonds?

Among the synthetic diamonds, this type came second. While HPHT diamonds took birth in the 1940s, CVD diamonds were not developed until the 1980s. Following the invention of the former and how fastly they began to get value in the diamond market, researchers began to search for new methods of making synthetic diamonds. As years went by, experiments were done and the new technique was found to be effective. These methods needed lower temperatures than the previous method yet could produce identical stones to HPHT diamonds. The CVD method was thus proven to be a best alternative to HPHT.

Can all lab grown diamonds be CVD diamond

No, lab grown diamonds include all categories of synthetically made diamonds. The major types include HPHT and CVD diamonds. While both are types of lab grown diamonds, their way of reaching their complete form differs. Moreover, the level of purity can also differ between the two.

Even though synthetic gemstones are the same as natural ones except for their origin, they tend to be cheaper than diamonds made by polishing natural rough stones. Lab grown diamond manufacturers in India, therefore, make artificial diamonds and export them around the world. Out of these, a major portion is occupied by CVD diamonds of various sizes and prices.

With new developments in the diamond manufacturing arena and the lessening demand for natural ones due to their social costs, this particular type of synthetic gems has slowly taken over the market not just here but around the world. In the year 2019, a whopping 29% rise in the price of these incredible artificial gemstones was reported due to the increase in demand and limited supply.

What are the pros of Chemical Vapour Deposition Diamonds?

CVD diamonds are preferred by many due to certain advantages that they hold especially over their natural counterparts. They are as follows:

Aom Diamond | Lab Grown Diamond Manufacturers, Supplier, Wholesaler In India

Excellent quality

In laboratories, lab grown diamonds are formed under strict measures. These are made under the supervision of expert eyes that make sure that the diamonds are flawless. When made by nature, they tend to be affected by numerous factors that affect the clarity of the stones. However, the safe atmosphere created in labs is able to produce the perfect diamonds that can be made. A Chemical Deposition machine is used to generate these shiny gemstones that are later embedded in jewelry or used for other procedures.

cvd diamond


Made in labs, these lab grown diamonds are not anywhere near nature to cause any kind of harm to it. Natural diamond is losing to man-made ones due to their social costs and material waste created post-extraction. Moreover, mining is to be done to pick the natural rough stones that leave behind huge holes that affect nature in various ways. From soil erosion to deforestation, the list goes on. Usage of fossil fuels for intensive digging is another major reason that makes artificial diamonds a better choice.

cvd diamond manufacturer in surat

Guilt-free origin

Child labour and exploitation of workers tend to haunt the mining process making natural stones less preferable. Their origin is not conflict-free unlike diamonds made in labs. CVD and  HPHT diamonds are made without any involvement of manual labour. They are crafted in machines that are set up for the purpose. Conflict or exploitation of humans or disturbance to any living creatures is never a part of their formation.

cvd diamond

Purer than natural diamonds

Being mostly Type II diamonds, Chemical Vapor Deposition gemstones are purer and brighter than nature-made ones. They appear whiter and the clarity makes them the perfect choice for jewelry. They are the synonym of perfection for they are flawless in every way.

cvd diamond


Being artificial and taking very little time for formation, these diamonds are available at prices much lesser than natural diamonds. They are often priced 20-30% lesser than their counterparts. CVD diamonds are therefore a budget-friendly choice that can give you the satisfaction of owning a shining original gemstone spending a much smaller amount than for natural diamonds.

Do these diamonds come with a guarantee?

Yes, these synthetic diamonds come with the certifications of reputed institutions such as GIA, For grading, the CVD diamonds are handed over to the experts and they decide the quality of diamonds whether natural or artificial. It was in the year 2006 that GIA announced that man-made diamonds would be provided certifications by them.  The Gemological Institute of America is one of the most coveted diamond grading institutes in the world. It is considered as the pioneer in the field with years of experience determining standards for grading diamonds.

Like GIA there are other organizations that decide and grade CVD diamonds based on their quality. Some of them are :

  • IGI
  • SGL
  • AGS
  • EGL
  • SGL
  • DGLA

The list does not end here. With the advancement in technology and improvements in the current grading systems, with time more institutes will emerge helping the growth of the diamond manufacturing sphere. CVD diamonds being the purest among all excellent grades for their clarity and cut. They are graded based on four major areas such as color, clarity, cut, and carat weight.

What to look for when I buy CVD diamond?

When you get a  report check for the following details which are the basis for grading:


Chemical Deposition Vapour diamonds come in a wide variety of colors. Fancy brown, pale pink, yellow, white are just a few among the variations. They are colorless or near-colorless CVD diamonds that are in great demand. As they are replicated using machines, they can be made easily according to the demand.


The clarity of each stone is determined by the atmosphere that it is made. They tend to have inclusions on them that affect the clarity and texture. While some inclusions can be observed with the naked eye, some are not noticeable even after being magnified under a microscope. High temperatures are the primary reason that decides the presence of inclusions on the diamonds and decides the clarity of the same.


The most important factor, the cut, is the proportion and symmetry of the diamonds. Each CVD diamond is made more beautiful mainly by its cut than any other factor. Cuts come in various names and types. It gives the diamond its identity. The emerald cut is one of the famous cuts. It is mostly used for adorning engagement rings.

Carat weight

Depending upon the substance in each diamond and size, the weight changes. CVD diamond price just like any other type is determined primarily by the carat weight. 1 carat equals to 0.2 grams. Cutting a diamond is a pretty balanced procedure that carves the stone for its better look.

How is CVD diamond price determined?

The price of a diamond is determined mainly by the 4Cs. RapNet is another major factor that influences the price. It is the international benchmark used by dealers to set diamond prices in the markets. It is the largest online market for diamonds publishing the price list depending on the economic changes.

The Rapaport Group was established in 1976. It published its first price list in 1978. This institution through the new system brought standardization and transparency in establishing the prices. Today all the diamond manufacturers in India use RapNet to decide the final price of each diamond.

18 FAQ About CVD Diamonds

Are CVD diamonds real diamonds?

Yes, they are real diamonds just like the polished natural rough stones. They have the same physical, chemical, and optical properties as natural diamonds. The clarity of a CVD diamond is something that makes them stand apart from the rest of the diamonds.

What does CVD stand for?

CVD is the short form for Chemical Vapour Deposition, the method with which these diamonds are made.

Is a CVD diamond worth spending money for?

Yes, you can own a beautiful stone at an affordable price if you opt for this synthetic diamond. Often used for adorning jewelry, it can add beauty to any ornament that it becomes a part of.

Are CVD diamonds a good investment?

They are not the ideal investment. Because lab grown diamonds tend to be made in a much easier way than their natural counterparts they are available at less cost. Moreover, the value rarely boosts up making them not the best investment like natural diamonds.

Is a CVD diamond the same as moissanite?

No, it is not the same as moissanite. Unlike the latter, a CVD diamond is a real diamond and not an imposter. Moissanite can never be considered a real gem. It just gives the appearance of a diamond and is not near to a real diamond in terms of quality, value, and price.

How long does it take for a CVD diamond to form?

As they are made in laboratories in sophisticated machines, they take very little time compared to natural diamonds for formation. Utmost about two weeks is taken by a CVD to reach its complete form.

Is CVD diamond the same as HPHT diamond?

In terms of the optical and chemical properties, both CVD and HPHT diamonds are the same. Both are developed from carbon. They look alike and it is hard to tell them apart. The only difference is how they are made. HPHT diamonds are made in a high pressurized atmosphere in very high temperatures where a seed of the diamond is covered in molten metal. CVD diamonds on the other hand do not demand such an intensive environment. The diamond seed is placed inside a chamber which is filled with gas and heated to make the carbon disintegrate into particles that get layered on the surface of the seed making it grow in size.

How are CVD diamonds better than natural diamonds?

They are better than natural diamonds as they are eco-friendly, do not exploit human labour, have better clarity and purity, are inexpensive, and have all the features of a natural diamond. In a nutshell, one can have all the benefits of a natural stone at a better price and avoid the negatives conveniently.

What are type II diamonds?

Type II is the purest among all diamonds formed naturally and artificially made. Hence they make less than 2% percent of all diamonds available on the planet. CVD diamonds mostly fall in the category and are therefore always in high demand among synthetic diamonds. These diamonds are known for their clarity and brightness.

What are the various classifications of CVD diamond?

CVD diamonds can be divided into four types based on their granule size: ultra nano crystalline, nano crystalline, micro crystalline and single crystal diamond. The grain size differs based on the method used, substrate, and thickness of the layers. There is also another set called polycrystalline CVD diamonds which have thick layers and are more durable.

Where can I find excellent CVD Diamond manufacturers in India?

India serves 90% of the world’s diamond needs. The diamond manufacturers in India are known for the wide variety of CVD diamonds produced. These are not just sold in India but are also exported to other countries like Germany, the US, the Gulf countries, Hong Kong, and the European nations. The best CVD Diamond manufacturers are therefore found in the country. Aom Diamond was established here in 1997.

Do CVD diamonds come with a guarantee?

Yes, these diamonds are backed by a guarantee in the form of grading reports provided by reputed institutions such as GIA. Moreover, the diamond manufacturer that sells you the diamond will give you an additional guarantee if they are genuine in their business.

What to look for when I decide to buy a CVD diamond?

Before buying the diamond you chose, make sure that you go through its report detailing all the specifications of the chosen diamond. Ask the seller if you have any doubts regarding the product and ensure that you are buying a real diamond.

Are CVD diamonds harmful to the environment?

No, they are not. These diamonds are created by expert CVD diamond manufacturers that are made entirely in safe laboratories away from nature. Therefore, these diamonds do not negatively affect other living creatures or their habitat in any way. Natural diamonds on the other hand can leave bad bruises on Mother Nature.

Do these diamonds have impurities in them?

No, these diamonds do not have impurities in them as they are made in CVD machines in the specific method developed especially for making such pure gemstones. CVD diamonds unlike HPHT diamonds are devoid of boron and nitrogen impurities making them fall under the Type II category.

How to buy CVD diamonds online?

You can find ways to buy CVD diamonds online if you go through the websites of various diamond manufacturers in India. Visit these platforms, study the products, their specifications, and prices to find the apt seller for your needs. As online ordering has become so easy, placing a request for your diamond is now a piece of cake. Aom Diamond provides excellent logistics and delivery service.

Do CVD diamonds have inclusions?

Yes, CVD diamonds have inclusion in them just like HPHT diamonds and natural rough stones. The high temperatures can result in inclusions thereby affecting the clarity and texture of the diamond. Therefore, not every CVD diamond will have the same level of brightness.

Can I avail discount for CVD diamond?

Yes, Aom Diamond being the best among the CVD Diamond manufacturers in India offers a wide variety of the particular type of artificial diamond at their best price. On special occasions, we also offer excellent discounts on prices based on the quantity and type of CVD diamond the customer chooses. Our team can help you learn all about your selected CVD diamond.

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