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The process begins with a thin diamond seed—often created through HPHT—placed in a sealed vacuum chamber. The chamber is filled with carbon-rich gases like methane, which are then heated to extremely high temperatures.
As the gases are ionized into plasma, their molecular bonds break, and carbon atoms begin to settle onto the seed. Over several weeks, these atoms crystallize layer by layer, gradually forming a complete diamond with the same optical and physical properties as a natural one.
CVD allows for remarkable control over the diamond’s characteristics, making it ideal for creating large, high-clarity stones suitable for fine jewelry.
Lab-grown diamonds are indistinguishable from natural diamonds, except they are produced in a controlled laboratory environment using advanced technology rather than forming deep within the earth.
The primary methods for creating lab-grown diamonds are High Pressure High Temperature (HPHT) and Chemical Vapor Deposition (CVD). These techniques replicate the natural processes of diamond formation, resulting in stunning diamonds grown in a meticulously regulated lab setting.
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The high-pressure, high-temperature (HPHT) diamond production process was originally developed for industrial use in the 1950s. Today, it is primarily used to grow lab-grown diamonds, though it can also enhance the clarity and Colour of mined diamonds.
The HPHT method replicates the intense heat and pressure found deep within the Earth, where natural diamonds take billions of years to form. In contrast, this technique allows a diamond to grow in just a few weeks.
HPHT diamonds are produced using one of three methods: the split-sphere (BARS) press, the cubic press, or the belt press. A tiny diamond seed is placed in a carbon-rich environment inside a high-pressure, high-temperature growth chamber. Over several days, the carbon melts and crystallizes around the seed, forming a full-sized, brilliant diamond.
The Chemical Vapor Deposition (CVD) method is a modern technique used to grow high-quality lab-grown diamonds. Unlike HPHT, which mimics the deep-earth conditions, CVD builds diamond layers by layer in a low-pressure, high-temperature chamber. This method is especially known for producing diamonds with exceptional purity and precision.
The Carat Creations lab diamonds are obtained from laboratories that utilize both HPHT and CVD production methods, depending on the desired size and carat weight of the diamond.
