The QUINTUS high pressure apparatus Q-20. In the middle is the cubic high pressure chamber. It is in operation pressed on each side by an anvil. One of the six anvils is not yet assembled to show the cube. The outside of the six anvils is a sphere.
Erik G. Lundblad
CC BY 4.0
Digitalt museum, Sweden. Quintus. Diamant, syntetisk / Tekniska museet ID: TEKS0045215