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Technology
Technology

How do we make our Diamonds?

We create our one-of-a-kind diamonds with the CVD process.

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The CVD Method

process in details

A fine diamond plate is laid in a cultivation chamber. A tungsten cathode and a copper anode generate a high-current arc, to which two working gases, argon and hydrogen, are added. Through heat and ionisation a plasma jet is created, which has a temperature of approximately 10,000K and a speed of around 300 metres/second. This plasma jet is passed through a water-cooled reactor with a pressure level of 10-15 kPa. The reactive gas methane is input into the nozzle outlet of the reactor, where it splits into carbon radicals, atomic carbon and hydrogen. The high temperatures of the plasma jet require the substrate to be cooled to approximately 1000°C. The diamond is deposited from the substrate. Atom by atom, the diamond grows, as it is simultaneously placed under high pressure. Through this, not only does it become particularly hard; it also develops a better colour and radiance.

Every cultivated CVD diamond is unique – exactly like mined diamonds, just without their negative ramifications for humans and nature. We have focused on an individual and demand-based development and, through this, we can ensure the best quality. Rather than extracting a hundred million carats out of mines, we believe in the zeitgeist, sustainability and the magic of technology.

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Lab diamonds common questions

  • Are lab-grown diamonds a new phenomenon?
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    No, actually. Back in the 1950s, diamonds were already being created in laboratories. The first diamonds produced in this way were primarily used for industry, as they did not possess the quality of gemstones. Gradually, the methods of cultivation were perfected, but it is only in the past few years that the quality of lab-grown diamonds has reached that of natural ones.

  • What differentiates CLOUD 9 diamonds from natural ones?
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    Our diamonds are grown in a laboratory. Natural conditions are simulated in the plasma reactor. There, a diamond grows in a few weeks, while in nature this process would have taken millions of years. Our lab-grown diamonds cannot be distinguished from natural ones because they are identical in their chemical, visual and physical composition.

  • What is a Type IIA diamond?
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    All of the most famous and particularly brilliant diamonds in the world are Type IIA diamonds. The Koh-i-Noor, the Elizabeth Taylor Diamond (Krupp), the Regent Diamond and the Star of the South Diamond. Only 1-2% of all natural diamonds belong to this grade. They are the clearest and hardest diamonds of the world; they have no inclusions or flaws. All CLOUD 9 diamonds are Type IIA.

  • How are CLOUD 9 diamonds created?
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    Our diamonds are cultivated with the CVD (Chemical Vapour Deposition) process. A small diamond plate is laid in a growth chamber, and stimulated to grow through a plasma jet. In this way, over the course of several weeks – atom by atom and layer by layer – an individual and unique diamond takes shape.

  • If CLOUD 9 diamonds are identical to natural ones, why are they expressly classified and certified?
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    Because we wanted to make it clear that our diamonds are created under ethical conditions for humans and nature. We believe in transparency for the consumer.

  • Are CLOUD 9 diamonds available in different cuts and colours?
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    Of course. We produce diamonds in the classic patented cuts as well as in special shapes like the heart, the arrow, oval and square forms, marquise, emerald, princess, pear, radiant and cushion. These are available in various colours: from blue, yellow, orange, red, green and pink to purple, brown and black.

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