Geometrical shell effects on stability and fragmentation of multiply charged rare gas clusters are theoretically investigated. Appearance sizes of multiply charged clusters are calculated using the global minimum energies of Lennard-Jones clusters and the liquid drop model (LDM) at temperature T = 0 K. The present calculation gives smaller appearance sizes than those in a previous calculation at T= 40 K. As for Ar-n(2+) and Ar-n(3+), the present calculation well reproduces the results of a previous experiment. Shell effects of parent clus ters are observed in the appearance size when LDM predicts an appearance size that is slightly larger than a magic number. (c) 2007 Elsevier B.V. All rights reserved.