The National Ignition Facility (NIF) test chamber where a diamond was compressed to the density of Jupiter’s core is a large aluminum sphere inside a facility the size of 3 football fields.

Yannong Han, Xiaorong Li, Yongcun Feng, A new approach to evaluate rock drillability of polycrystalline diamond compact bits using scratch test data, Energy Exploration & Exploitation, Vol. 38, No. 4 ...