Fools Gold In Rock Minerals

With the chemical formula FeS2 pyrite, is one of the types of sulphide minerals which are common in nature, either as a byproduct of a hydrothermal deposits or as accessory minerals in some rock types. Descriptively, pyrite has a golden yellow color with a metallic sheen. So, if you are not familiar with metallic minerals, and pyrite is often regarded as the gold. In the crystal structure, both pyrite and gold together cabbage, but the nature of it that are different. Gold is more malleable than pyrite. If beaten, pyrite will shatter, whereas gold is not easily destroyed because they are more malleable. The mineral pyrite, or iron pyrite, is iron  sulfide with the formula FeS2. Glittering metallic  mineral is pale-to-normal, brass yellowish  hue, and often also earned the nickname as a stupid  gold due to its resemblance  to gold. PHYRITE  name comes from the Greek (purit─ôs), "fire" or "in fire",  from (pur), "fire". In ancient Roman times, this name was applied to  several types of stone that will create a spark when struck against steel. Pyrite  is usually found associated  with other sulfides or oxides in quartz veins, sedimentary rock, and metamorphic rocks, and  also in coal beds, and as a replacement  mineral in fossils. Although  dubbed the dumb gold, pyrite  is sometimes also contain a small amount of gold in it. Gold and arsenic  occurs as a coupled substitution in the pyrite structure. In the Carlin gold deposit, Nevada, arsenian pyrite contains up to 0.37 wt% gold.
Mineral Facts Phyrite:

Chemical Formula: FeS2 The Minerals is 46.6% iron by weight. 
Iron disulfide, FeS2 = Sulphur 53.4, Iron 46.6%. Sometimes contain small amounts of nickel, cobalt and copper. Often carry a small amount of gold (auriferous pyrite).
Color: pale yellow brass on the surface of fresh, stain to a darker color. Streak: greenish or brownish black
Hardness: 6.0 to 6.5 (This is extremely difficult for sulfide a)
imperfect cleavage and its fracture conchoidal. This mineral fragile.
Isometric: Cubic

The number of forms that have been observed in pyrite crystals are very large. cube is the most common, with a face usually becomes striated, the striae on the face of adjacent mutually perpendicular. Among other types, octagonal, square and twelve frames.

 Luster: Metallic, luster is very brilliant and radiant.
Optics: (Refractive Index): a = 1.730, b = 1.758; y = 1.838
Composition, Structure and Mineral associations Phyrite
   Pyrite, one of the most common of all minerals, found under many different conditions such as crystals, aggregate crystals as dry as a crystalline mass. This occurs in almost all conditions and in all situations. It is easily recognized by the bright yellow color, brilliant luster and hardness.
   Pyrite in some form  similar to the gold which was then commonly known as fools  gold. You, of course there is no difficulty in   distinguishing between gold and pyrite, because  pyrite containing sulfur and dissolved in nitric acid, whereas gold does not contain sulfur and acid-insoluble in all simple. 
   Pyrite  occurs in veins and as grains  or crystals are embedded in all kinds of rock. In the stone usually appears as a crystal, but in vein-masses may appear either as crystal, with other minerals, or as a structureless  mass of emitting or fully occupying the gap vein. In the slates often occurs in rounded nodules and concretions of various shapes, as well as crystals. This mineral  is a product of the process of freezing, metamorphic and water. Pyrite  weather ready to limonite. In the body of ore near the surface was oxidized. Some of the changes to FeSO4  minerals that seeps down and helps in concentration of any precious metals that may be present in small quantities in the ore. Another part of the iron  remains near the surface  in the form of limonite. These include oxidized  material known as "gossan" and it is characteristic of all the pyrite deposits. Pyrite is often mined for gold or  copper associated with it. Due to large amounts of sulfur present in the mineral was never used as iron ore.
    Pyrite is used primarily in the manufacture of sulfuric acid. This mineral is burned in the furnace and SO2 gas produced thus brought to the condenser where they are oxidized by finely divided platinum or the oxides of nitrogen. The residue, consisting mostly of FeO2, sometimes processed to iron or made ​​into paint. These residues are sometimes also contain gold and other precious metals that may have been in the original pyrite. Sulfuric acid derived from pyrite into many manufacturing processes, and the greater part of it will be consumed in the artificial fertilizer industry. 

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