Jeweled headgear is a type of headwear that is adorned with precious stones and gems. The two most common types of jeweled headgear are tiaras and diadems. A TIARA is a type of crown that is typically worn by royalty or brides on their wedding day. A DIADEM is a type of crown that is usually worn by royalty or those of high social standing. Both tiaras and diadems are often decorated with jewels, making them a luxurious and elegant form of headwear.