PYRITES
- marcasite
- PYRITE, a metallic sulfide [n]
- very common brass-yellow mineral, iron disulfide, FeS2, with a metallic luster, burned to sulfur dioxide in the manufacture of sulfuric acid: chemically similar to marcasite, but crystallizing in the isometric system
- any of various other metallic sulfides, as of copper or tin
- common yellow mineral containing sulfur and iron
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