Medium : 3.0-4.0 cm
big : 4.0-5.0cm
Brilliant Pyrite Spark from Peru.
Its crystalline system is cubic, giving rise to very beautiful and spectacular crystalline formations, such as the cube, octahedron, pyritohedra (twelve pentagonal faces) and rarely icosahedrons (twenty triangular faces).
Pyrite is one of the most used Minerals to obtain sulfuric acid due to its high percentage of Sulfur.
The piece you receive may differ slightly from the photo shown, as the minerals they are natural and there is no identical piece. The size is approximate.