His Feast Day is September 18th. He is the patron of heavy metals and is represented as an iron-grey peacock with a tail made of oil-slick iridescence. Iridian's aid is sought during clean-ups of pollution spills and is invoked to ward off environmental disasters.
Nothing is known about the early life of Saint Iridian. Some hagiographers believe him to be a complete fabrication and his aptronymic name is perhaps support of that. Iridian means 'pertaining to a rainbow', a very on-the-nose description of his tail.
He is not to be confused with Saint Argus, who is also sometimes depicted as a peacock.