Pyrite

This piece is from Peru and captures the beautiful cubed clusters perfectly.
 
Pyrite is an iron sulfide mineral with a metallic luster. It has and a brassy coloring that is similar to gold, because of this resemblance it is also known by the name Fools Gold. It comes from the cubic crystal system and has an opaque transparency and a brittle texture.
 
Metaphysical Properties in short.
Boosts confidence levels
Helps overcome fears and anxieties 
Abundance and success
Clears blockages in the Sacral and Solar Plexus chakra
Protects from negative energy