The price of gold and coins today, October 25, 1405; How much does 18 carat gold cost? The price of gold and coins was announced today, Sunday, October 25, 1405. According to the official rates of the Gold and Jewelry Association, each gram of 18 carat gold is valued at 26 million 14 thousand tomans and the new coin in the new design of Tambar Azadi was 26 million 300 tomans.