Under conditions of extremely high
temperature and pressure, carbon atoms
arrange themselves into regular patterns that
are interconnected in three dimensions.
This strongly
reinforced framework
is what gives its
remarkable hardness.
The closeness of the atoms makes diamond very
dense and also allows it to bend light, producing
Approved its much-admired sparkle when diamond is
cut.
This three-dimensional structure does not
allow the free flow of electrons, so diamonds do
not Not Approved conduct electricity.