The element distorts the force of gravity within itself and, when stimulated by an electrical current, it can cause powerful and uncontrollable gravity waves.
Gravitonium is a rare element in the Marvel universe that was introduced on Agents of S.H.I.E.L.D. back in Season 1.
Gravitonium combined with Daisy’s powers as Quake could conceivably result in destruction on the scale of Earth breaking apart.
The waves can affect the gravity of anything within range, and we saw its potential devastation in Season 1.