"King of Diamonds" is a term used to describe a playing card in a deck of cards. It is also known as the "King of Coins" or the "King of Pentacles" in tarot cards. Other synonyms for the "King of Diamonds" include the "Rider" or the "Rider King." In some parts of Europe, it is referred to as the "Dame of Diamonds," while in France, it is known as the "Roi de Carreau." The "King of Diamonds" is often associated with wealth, power, and material possessions, making it a symbol of success and prosperity. It is also used to represent a wealthy and influential person in some cultures.