  The shelling of crystals is concerned with counting the number of atoms on
spherical shells of a given radius and a fixed centre. Its straight-forward
generalization to quasicrystals, the so-called central shelling, leads to
non-universal answers. As one way to cope with this situation, we consider
shelling averages over all quasicrystal points. We express the averaged
shelling numbers in terms of the autocorrelation coefficients and give explicit
results for the usual suspects, both perfect and random.
