Harry Potter Diadem Stud Earrings It is said Rowena Ravenclaw stole the Diadem from her mother as she envied the attention she received when wearing it. The Diadem stud earrings are sure to draw attention, especially if you wear it with the matching necklace also available. The diadem is approx. 1.2cm in height and 1.4cm wide Made from silver plated alloy with crystal detailing