Albino Rhoa Feather
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The Albino Rhoa Feather is a currency item with no known uses. The consensus among players is that it is a joke item placed in the game to perpetuate the fishing joke/troll started on the Path of Exile forums. Whether this is true or not remains to be seen.
MenderSwiftpaw has created a forum thread dedicated to this currency item with some information and videos. You can check out the thread here: The Truth about Albino Rhoa Feathers.