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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 diamonds 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 diamond.

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 diamonds such as HPHT diamonds, these are included 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.

Being artificial diamonds, there often comes up a question where CVD diamonds are real diamonds. They are real as natural diamonds having the same physical, chemical, and optical properties. CVD diamonds can be used in the place of natural diamonds without any hesitation. In fact, artificial diamonds are known to be of higher quality than 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 diamonds 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 the experts cannot tell them apart. Due to this, CVD diamonds are replacing the natural rough stones in every arena as possible. From jewellery to polishing, these lab grown diamonds have proved their worth and credibility.​

CVD Diamonds

Are CVD Diamonds Real?

How is a Chemical Vapour Deposition diamond made?

The making of a CVD diamond is quite an intensive process. Over the years, as technology became more advanced, research on these diamonds also increased. Their quality rose with time and so did the variety 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 CVD diamond 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 in 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. 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 diamonds 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 the experts cannot tell them apart. Due to this, CVD diamonds are replacing the natural rough stones in every arena as possible. From jewellery to polishing, these lab grown diamonds have proved their worth and credibility.

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

CVD creates diamonds that are categorised as TypeII A. This category of diamonds 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 diamonds. Hence these have a slight edge over HPHT diamonds. However, in terms of chemical and optical properties, both are the same.
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 HPHT diamonds 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 the next best alternative to HPHT.
CVD Diamond

What is the history of CVD Diamonds?

Can all Lab Grown diamonds be CVD diamonds?

No, lab grown diamonds include all categories of synthetically made diamonds. The major types include HPHT diamonds 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 diamonds are the same as natural diamonds except for their origin, these diamonds 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 diamonds due to their social costs, this particular type of synthetic diamond has slowly taken over the diamond 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 natural diamonds. They are as follows:

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 jewellery or used for other procedures.

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 diamonds 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.

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 diamonds and HPHT diamonds are made without any involvement of manual labour. They are made 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.

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

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% less than their counterparts. CVD diamonds are therefore a budget-friendly choice that can give you the satisfaction of owning a shining original diamond spending a much smaller amount than for natural diamonds.

Do these 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 :
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.

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 these diamonds is determined by the atmosphere that they are made in. 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 diamond cuts. It is mostly used for adorning engagement rings.

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 is equal to 0.2 grams. Cutting a diamond is a pretty balanced procedure that carves the stone for its better look.

When you buy a CVD diamond make sure to go through the grading reports before you make up your mind.

We provide you with world-class quality diamonds in a wide variety so you don’t have to worry. We keep everything you need. The inhouse of Rahi Impex is with the all shapes of gorgeous diamonds at the most suitable price.

What to look for when I buy a CVD diamond?

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 diamond prices. Today all the diamond manufacturers in India use RapNet to decide the final price of each diamond.

From where do you have to buy your CVD Diamonds?

Buying diamonds from an entrusted Lab grown diamond company is vital. With this, you’ll get the reassurance of your diamond’s standard and avail about its ethical source. If the corporate provides certification, you’ll get consent that the standard deserves its price. An online platform is best for purchasing diamonds and diamond jewelry. The manufacturer can directly sell their diamonds to the purchasers. And ordinary people get relief from paying extra to the double-dealing and mid-man. Also, We Are CVD Diamond Dealer in Surat, India.

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