The duration of growing laboratory-grown diamonds can vary depending on the chosen method and the desired size of the final diamond. Typically, the High Pressure High Temperature (HPHT) process takes several weeks to a few months. During this time, the carbon atoms crystallise and deposit onto the diamond seed under high pressure and high temperature conditions, forming a diamond layer by layer. On the other hand, the Chemical Vapour Deposition (CVD) process can take a bit longer, often ranging from a few weeks to several months. In CVD, carbon atoms are deposited on the diamond seed in a controlled environment using chemical reactions, leading to the gradual growth of the diamond. Regardless of the method, both processes require time and precision to produce high-quality, visually indistinguishable lab-grown diamonds that replicate the brilliance and allure of natural diamonds.