If you compare and own a lab grown diamond or are simply searching for a lab grown diamond, you may be wondering about jewellery. The Lab Created Gems are made from two processes: the High-pressure high temperature method or the chemical vapor deposition. That mimics the brilliance, clarity, and hardness of natural diamonds. But how do these diamonds differ? Let’s explore the distinctions between HPHT diamond gems and CVD diamond gems.
What are HPHT Diamonds?
HPHT diamonds are produced by a method that replicates the conditions obtained at the mantle where the diamond is believed to have originated. In the HPHT method, carbon is exposed to pressures more than 3GPa and temperatures of around 1500°C or 2700°F. Similar to HPHT diamond gems, the carbon solidifies, forming diamond structures to which it is known. This method was first developed in the 1950s to simulate the natural diamond embryo, and at present, it reflects one of the most common ways of producing diamonds artificially.
A strategic benefit offered by HPHT diamonds is the creation of Hydrothermal Emerald Gemstones, although this is considered a byproduct. Actually, the causes of the colouring of HPHT diamonds include a tinge of yellow or brown depending on the existence of nitrogen, which prevailed in the setting up of these diamonds.
What are CVD Diamonds?
The CVD diamond gem process is completely different from the above procedures. In the Chemical Vapor Deposition method, a gaseous mixture or a gas (often methane) is admitted into a chamber that is always under vacuum. This mixture is then ionised by employing microwave d nation or lasers to make carbon atom deposits and sooner or later develop into diamond crystals on the substrate. The CVD diamond gems are stated to be employed in industry and jewellery pieces as well.
HPHT diamonds, on the other hand, are thought to be harder to produce using large, uniformly shaped crystals, as with CVD diamonds. Moreover, CVD diamonds can offer tighter colour and clarity distributions as a result of stepped up arts of manufacturing. In CVD technology, diamonds can be synthesised with less nitrogen and other impurities, resulting in a higher clarity than those of HPHT. CVD diamonds are also categorised as type IIb. They also do not have a yellow or brownish colour, meaning they are nearly colourless.
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Key Differences Between HPHT and CVD Diamonds
1. Formation Process:
HPHT diamonds are made by exposing them to high pressure and high temperature, as occurs in the natural conditions beneath the earth’s crust. CVD diamonds, meanwhile, are made using gases and microwaves in a high-vacuum system before placing it in another reactor.
2. Appearance:
HPHT diamonds occasionally could be of a very slight yellow or brown, and CVD are more likely to be of a higher colour and clarity range than the HPHT.
3. Cost:
HPHT diamonds are generally cheaper, mainly because the method avoids the complex and time-consuming CVD procedure. The only disadvantage which may be associated with getting CVD diamonds, is the fact that depending on the size and quality of the stone, there may be some added cost.
4. Applications:
HPHT and CVD diamonds are applied to fine jewellery; nevertheless, HPHT diamonds consume much more energy in industrial sectors because of their reasonable price and acceptable wear resistance. CVD diamond is used in fine jewellery and gemstones because it contains less impurities than the high-pressure cultivation method.
Winding up
If you are interested in Hydrothermal Emerald Gemstone or are simply looking to purchase a stunning lab-created gem, understanding the differences between HPHT and CVD diamonds will help you make a well-informed choice.