In the diamond world, lab-grown diamonds are gaining popularity for their ethical and sustainable production methods. But when it comes to lab-grown diamonds, two methods stand out: chemical vapor deposition (CVD) and high-pressure high-temperature (HPHT). At Gemone Diamonds, we understand the importance of making an informed decision, so let’s compare CVD and HPHT lab-grown diamonds to help you decide which is best for you.
What is lab grown diamond
Lab grown diamonds are like test tube babies, grown from a seed of diamond under the same heat and pressure as on the surface of the earth. They are environmentally friendly as they do not harm the earth by mining.
What is the difference between lab grown and natural diamonds
Both HPHT and CVD lab-grown diamonds are chemically, physically and optically identical to natural gemstone. High quality lab grown diamonds can be so similar in appearance to mined diamonds that even experts need to look at them under a loupe to tell the difference.
This is why calling lab-grown diamonds artificial or synthetic may not be entirely true. Simply said, they weren't removed from the earth.
This means they are not like cubic zirconia gemstone or moissanite, which have different chemical structures to mined diamonds.
For mined diamonds, they also employ the same 4C classification scheme: color, cut, clarity, and carat.
How are HPHT diamonds made?
HPHT stands for high pressure, high temperature. Essentially, this is how things are created in the natural world. A tiny diamond seed is heated at a high temperature and pressure in the HPHT process to produce diamonds.
The circumstances are similar to those that occur deep under the earth, when real diamonds are created. The HPHT diamond gems enlarge with the addition of pure carbon over a few weeks or months.
How are CVD diamonds made?
CVD diamonds are created in a controlled environment using plasma technology.
A small diamond seed is placed in a chamber and exposed to a stream of carbon-rich gas. In the CVD process, this gas breaks down and thin layers of carbon are deposited on the diamond.
These gradually combine to form a bigger diamond over time.
The difference between HPHT and CVD Diamonds
Not all lab-grown diamonds are created equal. HPHT and CVD diamond gems
differ in a number of ways.
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First off, compared to CVD diamonds, HPHT diamonds are often of greater grade. This is because it is easier to control the conditions during the HPHT development process.
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In fact, once CVD diamonds are created, laboratories frequently utilize the HPHT technique to enhance them even further.
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In HPHT diamond will frequently have better color and clarity than a CVD diamond. This is because an HPHT diamond grows in 14 different directions, while a CVD diamond grows only in one direction. This has an impact on light refraction.
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Because of these factors, HPHTs are more expensive than CVD diamonds. Although the process of making them may be easier to control, it is still more difficult and time-consuming.
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HPHT diamonds are also typically smaller compared to CVD diamonds.
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But, CVD diamonds are more widely available than HPHT diamonds because the CVD process is less expensive and easier to scale.
Which one should you get, HPHT or CVD Diamond?
It's time to select the one that is best for you now that you are aware of the distinctions between HPHT and CVD. When you’re ready to go diamond hunting, here are a few things to keep in mind:
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Diamond quality
If you’re looking for a high-quality diamond, HPHT is the better choice.
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Diamond availability
CVD diamonds are more readily available than HPHT diamonds.
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Your budget
CVD diamonds are less expensive than HPHT diamonds, so if you’re on a budget, CVD may be the right choice for you.
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Diamond size
If you’re looking for a larger-sized diamond, CVD is the right choice for you.
Key points
In the world of lab-grown diamonds, both CVD and HPHT methods bring new innovations.
The choice between HPHT and CVD lab grown gemstone ultimately depends on your individual preferences. Consider factors such as color range, price, sizing capabilities, clarity, color control, and customization to make an informed decision. Regardless of your choice, both HPHT and CVD lab-grown diamonds embody responsible luxury and represent an ethical and sustainable approach to enjoying the timeless beauty of diamonds.
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