HPHT, which stands for High Pressure High Temperature, is one of the methods utilised to produce laboratory-grown diamonds. During this process, scientists recreate the natural conditions found deep within the Earth's mantle, where diamonds form over extended periods. The diamond growth begins with a small natural diamond seed as a foundation. A mixture of graphite and a metal solvent is then placed on top of the seed, providing the necessary carbon source for diamond creation. The growth cell containing the diamond seed and carbon source is subjected to incredibly high pressure, typically around 5-6 GigaPascals (GPa), and elevated temperatures of approximately 1500-1600 degrees Celsius. In this controlled environment, carbon atoms dissolve in the molten metal solvent and gradually precipitate onto the diamond seed, forming a diamond crystal layer by layer. Over several weeks or months, the growth cell is slowly cooled, allowing the diamond to solidify and take shape. The final lab-grown diamond is then cut, polished, and graded following the same criteria as mined diamonds, resulting in a high-quality, visually identical alternative that possesses the brilliance, sparkle, and durability of natural diamonds. The HPHT method offers a sustainable and ethically responsible option for acquiring diamonds.