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 mineral includes a label with the name and origin and is attached to a cardboard box. 4 cm square.
*The price is per unit (a single cardboard box of the four shown in the photo)
Since the minerals are natural, you will receive a piece similar to the one in the photograph. The minerals come in cardboard boxes and are glued to a porex base with hot silicone; these can be removed using ethyl alcohol without damaging the mineral. The size is approximate.