  We study the production and decay of a scalar \stst\ bound state \sigst\ at
hadron supercolliders, where \st\ is the lighter stop eigenstate. If \st\ has
no tree--level 2--body decays, the dominant decay modes of \sigst\ are $gg$ or,
if $m_h < \mst \ll \mstt$, a pair of light scalar Higgs bosons $h$.
Nevertheless the branching ratio into two photons is often large enough to
yield a detectable signal.
