We are the biggest pyrite products manufacturer in China. Ourmain products are high quality pyrite/ferro sulphide and itspowder. The quality and the size as follows:
Pyrite lumps(FeS2):
Quality:
S 45%min;
Fe 40%min;
Size: 3-15mm; 10-30mm; 10-50mm; 10-80mm.

Pyrite powder
Quality:
S 45%min;
Fe 40%min;
H2O 1%max.
Size: -5mm; -3mm; -1.6mm, -10mesh, -100mesh; - 200mesh; - 325mesh;- 400mesh.