The form and style of the band, on the other hand, has extra meaning that many couples use when designing a ring or selecting the appropriate ring to signify their relationship. The earliest reported diamond engagement ring was given in 1477 by Archduke Maximillian to his fiancée Mary of Burgundy. They were married the following year in a mass wedding arranged by her father. Although the ring was accepted by all as a sign of their love, no documentation exists to prove this. There are several theories as to why the couple did not marry in Rome like everyone else in Europe at the time: they may have wanted to save money; or perhaps they believed it wasn't necessary since they planned to spend the rest of their lives together. Today, an engagement ring usually has two parts: the band and the stone. The band can be made of silver, gold, platinum, or another metal. It often has symbols or letters engraved on it to represent the past or future marriage of the couple. These may be included in the setting of the ring itself or on attachments such as earrings or bracelets. The stone is the main focus of the ring. It can be one diamond or several diamonds joined together (a cluster ring). Sometimes the stone is covered with additional gems or jewelry. Colors include white, yellow, red, blue, green, and black. Carats and quality matter for the price. A large stone will cost more than a small one of equal quality.