The cube has six sides and represents the Earth and Root Chakras. While pyrite from Peru has a high vibration that is celestial in origin, these cubes have a more Earth oriented vibration that you feel from your toes up to your crown. Natural cubes of pyrite are fairly unusual.
Pyrite is often overlooked as a serious light working stone because people have called it 'Fools Gold' for so long that it has become devalued in our minds. However, Pyrite is a very powerful stone with wonderful and useful qualities that shouldn't be overlooked any longer. The Peruvian Pyrite is magnificent and holds the energies of the Golden Sun within it. It is amazingly energizing. It increases physical stamina, stimulates the intellect and helps to transform thought into intelligent action. It is a wonderful stone for use in wealth magic or in trying to manifest needed energies.
Pyrite helps us to think more clearly, raises our vibrations, and is also protective of the energy field. It helps fight infections. An excellent shield-stone, pyrite removes negativity from the aura. Marcasite is essentially the same mineral.