A few photons (even 2?) are enough to decoherence a dust particle in space (position eigenstates chosen) . If further photons impinge on it.. Can the dust particle be re-prepared? I think yes because the quantum is never switched of. So that it mean whenever eigenstates were chosen via decoherence.. it can still be reprepared, is this correct? If so.. then it is technically possible to re-prepare a small stone to change shape by shining massive laser photons into it? How? What must be the experimental setup to do that? And why not? What experiments have this done akin to this?