Question

what are four important uses of pyrite

Answer 1

Four important uses of pyrite (FeS2):

1. Source of sulfur and sulfuric acid feedstock
- Pyrite is roasted to produce sulfur dioxide, which is converted to sulfuric acid — a basic industrial chemical used in fertilizers, chemical manufacturing, and petroleum refining.

2. Iron ore (historical/secondary)
- In some situations pyrite has been used as a minor source of iron where richer ores were not available, though it is not a primary iron ore today.

3. Gemstone and ornamental material
- Polished pyrite ("fool’s gold") is used in jewelry, beads, and decorative items because of its metallic luster and brassy color.

4. Geological indicator and technological research material
- Pyrite is an important indicator mineral for hydrothermal ore deposits (often associated with gold), used in mineral exploration; it is also studied for applications in photovoltaics, catalysis and battery research.

(As a note, many industrial uses of pyrite for sulfur have declined because elemental sulfur is now a cheaper, cleaner source.)