Pyrite

The name pyrite is derived from the Greek word for fire, given
the name because striking two pieces together can produce
sparks. With a hardness ranging from 6 to 6.5, this metallic
yellow iron sulfide has earned the familiar nickname, “fools
gold”. Pyrite demonstrates many crystal patterns, one of the
most spectacular being large perfect cubes. The ancient Incas
used pieces of pyrite as mirrors. This mineral is believed to
enhance willpower and help overcome bad habits. It can also
help boost creativity and establish a “can-do” attitude toward
life. Pyrite is found world-wide, with important deposits in Spain,
Italy and Peru.