A number of minerals are found at Koh-i-Sultan; sulfur is the most important. Reserves were estimated in 1976 at of sulfur ore, of which were high-grade and low-grade ore. Sulfur is found on Sultan's southern flank, where it originated from solfatara activity. According to a 1975 report, about of 50-percent-sulfur ore were mined; the report indicated that between 1941 and 1944, of ore were produced. The recovery of sulfur, asafoetida and dyes at Koh-i-Sultan was claimed in a 1909 report.