Lab-grown diamonds typically take about six to ten weeks to be created. This process can vary slightly depending on the specific method used, such as Chemical Vapor Deposition (CVD) or High Pressure High Temperature (HPHT).
CVD Method: The CVD method involves a process where carbon-rich gases are ionized to break the molecules apart, allowing carbon atoms to precipitate and form a diamond on a substrate. This process generally takes about 8-10 working days to formulate a 1-carat lab diamond, and about a month to grow a 3-carat lab diamond. Growing diamonds faster than this can disrupt the crystalline structure, causing the diamond to break.
HPHT Method: The HPHT method mimics the natural process of diamond formation by subjecting carbon to high pressure and high temperature. This method can take anywhere from a few days to a few weeks to grow several crystals. Specifically, growing a 1-carat diamond using the HPHT method takes about a fortnight.
Both methods require precise control over the environment and conditions to ensure the diamond's quality and integrity. After the diamonds are grown, they are cut, polished, and graded similarly to natural diamonds.
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