A tiara (from , from ) is a jeweled head ornament. Its origins date back to ancient Greece and Rome. In the late 18th century, the tiara came into fashion in Europe as a prestigious piece of jewelry to be worn by women at formal occasions. The basic shape of the modern tiara is a (semi-)circle, usually made of silver, gold or platinum, and richly decorated with precious stones, pearls or cameos. Tiaras were extremely popular during the late 19th century and were worn at events where the dress code was white tie. After World War I, wearing a tiara gradually fell out of fashion, except for official occasions at a royal court. Interest in tiaras has increased again since the beginning of the 21st century. The word "tiara" is often used interchangeably with the word "diadem". Description The basic shape of the modern tiara is a (semi-)circle, usually made of silver, gold or platinum. Tiaras have also been made from tortoiseshell, coral and quartz, and in the 20th century unusual materials such as horn and aluminum were experimented with. Tiaras are usually richly decorated with precious stones, pearls or cameos, often arranged in symmetrical patterns. Common elements in these patterns are arcs, garlands, circles, stars, and stylised flowers or leaves. Occasionally, flowers, ears of corn, dragonflies or butterflies are depicted more or less 'true to life' by using gemstones in different colours. A tiara can contain hundreds to thousands of gemstones of different sizes and cuts; almost always, tiaras incorporate a large number of diamonds. This puts tiaras among the most expensive and spectacular pieces of jewelry. Tiaras come in different models, including: the bandeau, a tiara in the shape of a ribbon or hairband, the kokoshnik, a tiara that usually consists of a massive wall of gemstones; the shape is based on the traditional Russian headdress with the same name, the circlet, a tiara that extends around the circumference of the head, the fringe, a fringed trim of diamonds that can often also be worn as a necklace. Tiaras are worn on the head, but also around the forehead; this depends on the model of the tiara and the fashion of the day. Wearing a tiara can lead to headaches. To make it more comfortable to wear, a large tiara is often attached to a supporting frame that is cushioned by wrapping it with velvet ribbons. Some tiaras