# Compare the mineral halite (NaCl, hardness of 2.5) to diamond which is pure carbon chemically bonded to itself in a network. Are the mineral's chemical bonds covalent, polar covalent, or ionic? Which mineral is harder?

Clearly, $\text{diamond}$ is harder than $\text{halite}$.
On Mohs scale, isn't diamond assigned a $10$ on the basis of hardness?