Names: Pyritum.  Iron pyrites. Pyrite﹐ fool's gold

Actions: for dispersing heat and controlling pain, breaking blood clots, promoting the healing of broken bones and sinews, fractures of bones, wounds caused by sharp objects. 

Chemical ingredients: Ferrous bisulfide (FeS2) and some trace amount of cooper,  nickle, arsenic and antimony. 

Dosage: 3 to 9 g. Boil first when use in decoction or can be made into pills or powder form.

Cautions: not to use on those who are yin deficient with heat or on those who are blood deficient and those without blood stasis symptoms.