Pyrrhotite
Chemical Formula
Fe7S8
Chemical Class
Sulfides
Properties
It presents well formed pseudo-hexagon crystal habit, its hardness range from 3.5 to 4.5, and its density is 4.53. It has metallic gloss and its color can be bronze yellow, golden, reddish bronze and brown.
Origin
Morro Velho Mine, Nova Lima, MG.
Curiosities
Pyrrhotite is an iron sulphide that presents magnetism, and it is, after Magnetite, the most common mineral that manifests this property.
Use
It is a mineral used as raw material to manufacture sulphuric acid, and it can also be Ni and Co source.
Source: MM Gerdau - Museu das Minas e do Metal -