Inorganic Gemstones

Pyrite

Pyrite Gemstone

The name pyrite comes from the Greek word pyr, meaning fire, since sparks are caused if pyrite is struck with a hammer.

With its brassy yellow color, pyrite is often mistaken for gold (hence its other name is fool's gold). It occurs as bues, or as "pyritohedra", which have twelve faces, each with five edges. Pyrite has been used in jewelry for thousands of years, and examples form the ancient civilization of the Greeks, Romans, and Incas have been found. Today it is used mainly in costume jewelry, but is brittle and requires careful cutting.

Pyrite is found worldwide in igneous, metamorphic, and sedimentary rocks. Fine specimens come from Spain, Mexico, Peru, Italy, and France.


Properties
Chemical Composition: 
Iron Sulphide - FeO2
Classification / Type: 
Dimorph of Marcasite
Colors / Varieties: 
Brassy Yellow
Crystal System / Forms: 
Cubic System / Pyritohedron: Pentagon-dodecahedron, cubes, combination of forms
Hardness: 
6 - 6.5
Specific Gravity: 
4.95 - 5.10
Cleavage / Fracture: 
Indistinct / Conchoidal to Uneven fracture
Optic Character: 
Opaque
Lustre: 
Metallic
Refractive Index / Birefringence: 
-
Pleochroism: 
-
Dispersion: 
-
Magnification: 
Three sets of parallel oscillatory striations on adjacent faces.
U.V. Fluorescence: 
Inert
Spectrum: 
-
Cause of Color: 
Iron
Treatment (Enhancement): 
-
Specific Tests & Remarks: 
Greenish black streak, yellow color with metallic lustre.
Synthesis: 
-
Simulants (with key separation tests): 
Marcasite (S.G., orthorhombic crystal system)
Geological Occurrence: 
Abundant occurrence in all types of rocks - igneous, sedimentary and metamorphic rocks.
Sources: 
Italy, England, Norway, Sweden, Switzerland, U.S.A.
Cuts & Uses: 
Cabochons, cameos, beads, facetted cuts.

Did you know?

Jewellery is one of the most bought products online. An estimated $1 billion USD of diamonds are bought annually via the Internet. Over 40 million people use the Internet to trade!

In Germany, the garland of ambers is hung around the necks of the infants, so that their teeth might come out without much trouble.

In Turkey, people fix a piece of amber in the hubble-bubble, dogged by an age old belief that the presence of the jewel would destroy all the germs and no disease would spread, even after many have dragged their puffs from it.

In Greece, people think if wine is poured into the cups made of amethyst, one does not get drunk after drinking that.

In Rome, a talisman having coral pieces is considered very auspicious to quell the bad spells of evil look. The Romans were in the habit of hanging chains made of ancient coral pieces from the cradle of the infants to protect them from evil effects.

In China, people wear rings studded with tiny conch or oyster shells as they believe it cures all aches such as stomach ache, worms and like.

In India, pendants made of silver and studded with pearls are hung from the necks of the children to save them from any bad effects.

Greeks still believe, if women wear blue sapphires then no sense of immorality would pollute their mind nor can any fear of the supernatural can trouble them.

The Pope Innocent III had circulated an order asking all the priests wear blue sapphire, so that morality can be strengthened.

It is said about turquoise, that when the stone changes its color into yellow, it actually signals bad times to the person who wears it.

It is believed that a turquoise gifted to a friend or a lover turns his or her life into one of happiness and good luck.

Poll