  Dense QCD at zero temperature with a large number of colors is a crystal. We
show that in the holographic dual description, the crystal is made out of pairs
of dyons with $e=g=\pm 1$ charges in a salt-like arrangement. We argue that
with increasing density the dyon masses and topological charges equalize,
turning the salt-like configuration to a bcc of half-instantons. The latter is
dual to a cubic crystal of half-skyrmions. We estimate the transition from an
fcc crystal of instantons to a bcc crystal of dyons to about 3 times nuclear
matter density with a dyon binding energy of about 180 MeV.
