Tiara

A tiara (from Latin: tiara, from Ancient Greek: τιάρα) is a jeweled, ornamental crown traditionally worn by women. It is worn during formal occasions, particularly if the dress code is white tie.
Although usually associated with women of reigning and noble families, tiaras have been worn by commoners as well, especially rich American socialites like Barbara Hutton. Tiaras are generally a semi-circular or circular band, usually of precious metal, decorated with jewels and are worn as a form of adornment.