Have you ever wondered how diamonds are made in a factory? It all begins with high-purity graphite powder, mixed with metal alloy catalysts like iron and nickel, along with tiny diamond seeds. The mixture is placed inside a metal capsule, which is then set at the center of a cubic block made of a pressure-transmitting medium. After that, the whole assembly is loaded into a massive six-anvil press. The machine applies 5–6 GPa of extreme pressure while heating the chamber to 1300–1600°C. Under the