Leaves of Lorien

The Leaves of Lorien were brooches given by Galadriel to the members of the Fellowship of the Ring (with the notable exception of Gandalf, who was presumed at the time to be dead).

History
In The Lord of the Rings, Peregrin Took intentionally dropped his brooch while being carried by Uruk-hai as a signal to Aragorn, Legolas, and Gimli that they were on the correct trail.