razie aghaei, sed and sima news agency. the secretary of the iran coal producers association announced the import of half a million dollars worth of coal last year. mr. samadi added: iran 12 it has billion tons of geological reserves of coal, but 90% of coal mines remain unused . mr. samadi said that mandated pricing has effectively stopped investment in the sector. almost last year, 600 million dollars were spent on importing coal and its derivatives from the country , and it was half the price, not the free price, and while we have at least 90% of this, if the conditions were provided , if the price was the real price, the producer would spend for it. definitely, a significant part of this departure will be stopped. you know, in the 8 years of the sacred defense period, not one kilo of coal entered the country in the past, the price of domestic coal was 5,900,000 tomans, and the price of imported coal was 16,300,000 tomans. this is 16,300,000 tomans. the volume of gold bullion deposit certificate transactions in the commo