  We propose an interferometric set-up that utilizes the concept of quantum
coherence to provide quantum signatures of gravity. The gravitational force
comes into nontrivial play due to the existence of an extra mass in the set-up
that transforms an incoherent state to a coherent state. The implication uses
the fact that quantum coherence at a certain site cannot be altered by local
actions at a separate site. The ability to transform an incoherent state to a
coherent one in the presence of gravitational field provides a signature of
quantumness of gravity. We also observe that the results remain unaltered in
presence of a nontrivial quantity of depolarising noise.
