Did you know that 99% of synthetic diamonds are currently produced using high-pressure and high-temperature (HPHT) methods? A prevailing paradigm is that diamonds can only be grown using liquid metal catalysts in the "gigapascal pressure range" (typically 5-6 GPa, where 1 GPa is about 10,000 atm), and typically within the temperature range of 1,300–1,600°C.