  Dynamic Light Scattering (DLS) measurements were performed on colloidal
suspensions of Laponite\textsuperscript{\textregistered} at different
concentrations in the range $C_\text{w}= (1.5{\div}3.0)$%. The slowing down of
the dynamics induced by aging was monitored by following the temporal evolution
of autocorrelation functions at different concentrations towards the gel and
glass transition. Exploiting analogies with supercooled liquids approaching
their glass transitions, an Angell plot for the structural relaxation times was
drawn. Finally, the fragility of Laponite\textsuperscript{\textregistered}
suspensions at different concentrations, in different solvents, at two salt
concentrations and with the addition of a polymer was reported and discussed.
