How to Calculate Khums of Mine
Issue No. 1526- It is obligatory to pay khums on everything which is extracted from the mines of gold, silver, lead, iron, copper, coal, oil, sulphur, turquoise, salt and any other mines and various metals. The obligatory precaution is that there is no taxable limit (niṣāb). khums therefore, should be paid from whatever quantity extracted from a mine, whether less or more.