The Replicator Wand was a tool that could be used to replicate any object that it targeted at and then replicated them without any limit, either one at a time or in a direct succession. It could replicate items up to at least the size of a car. Its replicas are presumably permanent, but after the wand is destroyed, all of the copies created are destroyed along with it. The wand could be used by humans.
This wand belongs to Pearl. However, it becomes lost over time and is later found by Amethyst in her room. Amethyst, rather than returning it, uses it to replicate garbage and then stuffs it all in Pearl's room. She then allows Steven to borrow it in "Onion Trade". Steven uses it to create replicas of the G.U.Y.S. toy Dave Guy and attempts to trade several Daves for one Ranger Guy.
However, Onion trades for the wand itself and uses it to flood the town with Dave Guys. The Gems try to stop him, but Onion fights back by dropping several replicated cars on Garnet. Steven manages to tackle and disarm Onion. The Replicator Wand is crushed by Garnet after stating, "I'm not cleaning up this mess," referring to the disappearance of all the replicas if the wand is destroyed.