  We consider the finite density, zero-temperature behaviour of quark matter in
the instanton picture. Since the instanton-induced interactions are attractive
in both $\bar{q}q$ and $qq$ channels, a competition ensues between phases of
matter with condensation in either or both. It results in chiral symmetry
restoration due to the onset of diquark condensation, a `colour supercondutor',
at finite density. Also present is a state with both manners of condensation,
however this phase is found to be thermodynamically disfavoured for equilibrium
matter. Properties of quark matter in each phase are discussed, with emphasis
on the microscopic effects of the effective mass and superconducting energy
gap.
