Pyrrhotite (Fe₁₋ₓS) is a minor iron sulfide mineral primarily used as a source of sulfur and in some specialty chemical applications. Global production is concentrated in Canada, China, and Russia, with annual output estimated at 50,000–70,000 tons. Growth in production has been modest, averaging 1–2% per year, as pyrrhotite is often a byproduct of nickel and copper mining rather than a primary commodity. Price trends for pyrrhotite are relatively stable compared to other sulfides, with the market price ranging from $1,200–$2,000 per ton historically.