Dust

As Davros threatened to the Tenth Doctor, the reality bomb would have turned people, planets and stars into dust, which would become atoms which would ultimately become "nothing". (TV: Journey's End)

According to Amy Pond, petrichor was the smell of dust after rain. (TV: The Doctor's Wife)

As observed by the Ninth Doctor, moon dust was among the exhibits on display within Henry van Statten's vault in 2012. (TV: Dalek)

Rose Tyler gloated to Dalek Sec that she took the time vortex into the head of the Dalek Emperor and turned him into dust. (TV: Doomsday) Indeed, while she was possessed by the Bad Wolf entity, Rose was responsible for the utter destruction of the Emperor's half-a-million strong Dalek fleet. (TV: The Parting of the Ways)