Golden feather (Eagles' Peak)

The golden feather is a quest item used in the Eagles' Peak quest. It is found on a pedestal inside some caves under Eagles' Peak. The player must use the golden feather along with a bronze feather and silver feather in order to open a locked door that leads deeper into the caves.

The gold feather was once tradeable and people were offering to pay large sums of money for it. But after a few hours of release, the feather became untradeable and Jagex confirmed that it was a bug.