  We give a simple argument showing that in any sensible quantum field theory
the masses of black holes cannot assume continuous values and must be
quantized. Our proof solely relies on Poincare-invariance of the asymptotic
background, and is insensitive to geometric characteristics of black holes or
other peculiarities of the short distance physics. Therefore, our results are
equally-applicable to any other localized objects on asymptotically
Poincare-invariant space, such as classicalons. By adding a requirement that in
large mass limit the quantization must approximately account for classical
results, we derive an universal quantization rule applicable to all
classicalons (including black holes) in arbitrary number of dimensions. In
particular, this implies, that black holes cannot emit/absorb arbitrarily soft
quanta. The effect has phenomenological model-independent implications for
black holes and other classicalons that may be created at LHC. We predict, that
contrary to naive intuition, the black holes and/or classicalons, will be
produced in form of fully-fledged quantum resonances of discrete masses, with
the level-spacing controlled by the inverse square-root of cross-section.
