I have spent the whole night trying to do some research on Saudi coins. Fortunately, I have gained some luck to write an article about one great Coin of Saudi Arabia, the Umayyad Dinar. According to Wiki, the gold dinar is an Islamic medieval gold coin first issued in AH 77 (696–697 CE) by Caliph Abd al-Malik ibn Marwan. The weight of the dinar is 1 mithqal (4.25 grams or 0.137 troy ounces). The word dinar comes from the Latin word denarius, which was a silver coin. The name "dinar" is also used for Sasanid, Kushan, and Kidarite gold coins, though it is not known what the contemporary name was. The first dinars were issued by the Umayyad Caliphate. Under the dynasties that followed the use of the dinar spread from Islamic Spain to Central Asia. Just recently, a rare Islamic gold coin sold by Morton & Eden Ltd. Last April 4, 2021, it has established a new record price for a non-U.S. coin sold at auction. The Umayyad dinar dated A.H. 105 (circa A.D. 723 to 724) realized £3,