Pyrite

The mineral pyrite, or iron pyrite, also known as fool's gold, is an iron sulphide with the chemical formula FeS2. This mineral's metallic luster and pale brass-yellow hue give it a superficial resemblance to gold, hence the well-known nickname of fool's gold. The color has also led to the nicknames brassbrazzle, and Brazil, primarily used to refer to pyrite found in coal.

Pyrite is the most common of the sulphide minerals. The name pyrite is derived from the Greek (pyritēs), "of fire" or "in fire”, in turn from (pyr), "fire”. 

In ancient Roman times, this name was applied to several types of stone that would create sparks when struck against steel; Pliny the Elder described one of them as being brassy, almost certainly a reference to what we now call pyrite.

By scholar and scientist Georgius Argricola's time, the term had become a generic term for all of the sulphide minerals.

Pyrite is usually found associated with other sulfides or oxides in quartz veins, sedimentary rock, and metamorphic rock, as well as in coal beds and as a replacement mineral in fossils. Despite being nicknamed fool's gold, pyrite is sometimes found in association with small quantities of gold.

The ancient Incas used Pyrite as mirrors. It is found all over the world, but important deposits are in Italy, Spain and Peru.

Emotional properties of Pyrite are is said to be it may encourage one to overcome fears and take action. It may be used to help bring one out of one’s shell and to encourage one to be more dynamic and confident.

Physical properties are said to be the Sulphur component of Pyrite aids in purifying the body of infection and may stimulating proper endocrine function. It may be excellent for combatting male impotence and infertility. It’s iron component focuses the power of Pyrite into the blood and tissues, allowing it to may be used to combat skin disease, fungal infection and cellular invasion by viruses.