pyrites
- n any of various metallic-looking sulfides (of which pyrite is the commonest)
- n a common mineral (iron disulfide) that has a pale yellow color
- Now French machines, textiles and fertilizers might move southward again, in exchange for Spanish pyrites, copper and citrus fruit.
- They made a small amount of pyrites containing radioactive sulphur and mixed it with a coke-oven charge of coal.
- Sulphur from pyrites deposits was largely ignored, since brimstone is cheaper and easier to use.