Diamond anvil cells should be able to reach the given pressure (20 GPa?) easily. https://en.m.wikipedia.org/wiki/Diamond_anvil_cell https://en.m.wikipedia.org/

Diamond anvil cells should be able to reach the given pressure (20 GPa?) easily. https://en.m.wikipedia.org/wiki/Diamond_anvil_cell https://en.m.wikipedia.org/wiki/Diamond_anvil_cell