Both the hardness and the fragility of diamonds are responsible for the high structural ordering of the arrangement of carbon atoms in its crystal lattice. This ordering persists both in the short-range order and at distances comparable to the sizes of atoms, and in the long-range order. To make the diamond less fragile, scientists had to create a structure in which order would be preserved only at short and medium distances.
For this, at the stage of creating a diamond, scientists added fullerenes. The researchers managed to achieve their goals. It turned out that under pressure and heating, fullerene microspheres collapse, being embedded in the diamond structure.