The Suspicious Marbles are naturally spawning objects exclusive to Don't Starve Together, introduced in A New Reign. They resemble either a Clockwork Rook nose, a Clockwork Knight Head or a Clockwork Bishop Head. They cannot be put in the inventory and go directly into the chest slot if picked up. The player becomes very slow and cannot equip any item in the hand and chest slots, otherwise the Suspicious Marble is instantly dropped on ground. You cannot teleport with a Lazy Deserter or Souls when a Suspicious Marble is equipped.
Their only use is to be placed on the Marble Sculptures of their respective Clockworks.