Pyrite Sentence Examples

The mining product next in value to coal in 1908 was copper, taken chiefly in Carbon county in a zone of brecciated quartzite underlying schist, the original ore being chalcopyrite, with possibly some pyrite, a secondary enrichment, which has produced important bodies of chalcocite in the upper workings, but these are replaced by chalcopyrite at greater depth.

Pyrite, FeS2, contains 46.7% of iron.

Other mineral products are graphite, garnet used as an abrasive, pyrite and zinc ore.

Finely crystallized specimens of pyrite are obtained from many other localities, especially from Cornwall, Elba and Traversella, near Ivrea, in Piedmont.

Impurities.-The properties of iron and steel, like those of most of the metals, are profoundly influenced by the presence of small and sometimes extremely small quantities of certain impurities, of which the most important are phosphorus and sulphur, the former derived chiefly from apatite (phosphate of lime) and other minerals which accompany the iron ore itself, the latter from the pyrite found not only in most iron ores but in nearly all coal and coke.

The two assertions are not to be reconciled by pointing out that Professor Tornebohm underestimated, for instance crediting the United States with only 1 1 billion tons, whereas the United States Geological Survey's expert credits that country with from ten to twenty times this quantity; nor by pointing out that only certain parts of Europe and a relatively small part of North America have thus far been carefully explored for iron ore, and that the rest of these two continents and South America, Asia and Africa may reasonably be expected to yield very great stores of iron, and that pyrite, one of the richest and most abundant of ores, has not been included.

The most commonly found ammonites found are those of Iron Pyrite (Fools Gold ).

In the Bay Complex narrow zones of bleached rock are rich in calcite, chlorite and pyrite and contain minor chalcopyrite and pyrrhotite.

A large IP anomaly between Borland Glen and Coul Burn was interpreted as a steep-sided zone of disseminated pyrite with associated hydrothermal alteration.

The sulfide minerals recorded from the lodes comprise pyrite, pyrrhotite, chalcopyrite, galena, sphalerite and arsenopyrite.

Lodes in the Cornubian Orefield often contain abundant pyrite, especially the upper parts.

Both the shales and the quartz veins are impregnated with the common sulfide minerals pyrite and arsenopyrite.

The pyrite crystal (above left) has striations, or lines, on the surface.

Also noticeable at this site is the presence of common thin veinlets of pyrite.

Pyrite fossils need to be kept in very dry conditions.

A 25mm scalenohedral crystal speckled with pyrite crystal inclusions.

Pyrite nodules - rusty brown, heavy, ball-like concretions - are also common.

They do, however, not catalyze monosulphide conversion, i.e., pyrite formation.

The pyrite content is low for a phyllic zone.

Marcasite is actually iron pyrite, and it has been used to create jewelry for thousands of years.

Veins of white calcite visible in the stone are considered undesirable, however a dusting of gold pyrite is fine.

In the case of coal, salt, iron ore, pyrite and other homogeneous minerals, boring may give all the information required.

They are four important iron ores, magnetite, haematite, limonite and siderite, and one of less but still considerable importance, pyrite or pyrites.

The photo above shows where you should go to collect the iron pyrite ammonites.

Glass and other sands and gravel ($13,270,032), lime ($11,091,186), phosphate rock ($10,653,558), salt ($7,553,632), natural mineral waters ($7,287,269), sulphur ($6,668,215, almost wholly from Louisiana), slate ($6,316,8 I7), gypsum ($4,138,560), clay ($2,599,986), asphalt ($1,888,881), talc and soapstone ($1,401,222), borax ($975,000, all from California), and pyrite ($857,113) were the next most important products in 1908.

Sometimes, however, the term pyrites is loosely applied to both species, and the cubic pyrites is then differentiated by the name "pyrite" - a form which brings the last syllable into harmony with the spelling of the names of most minerals.

Contrary, too, to popular belief, he has found a fibrous structure more common in pyrite than in marcasite.

Iron pyrites, or pyrite, belongs crystallographically to the parallelfaced hemihedral class of the cubic system.

It occurs in nature as the mineral melanterite, either crystalline or fibrous, but usually massive; it appears to have been formed by the oxidation of pyrite or marcasite.

Though it contains far too much sulphur to be used in iron manufacture without first being desulphurized, yet great quantities of slightly cupriferous pyrite, after yielding nearly all their sulphur in the manufacture of sulphuric acid, and most of the remainder in the wet extraction of their copper, are then used under the name of " blue billy " or " purple ore," as an ore of iron, a use which is likely to increase greatly in importance with the gradual exhaustion of the richest deposits of the oxidized ores.

Pyrite may be prepared artificially by gently heating ferrous sulphide with sulphur, or as brassy octahedra and cubes by slowly heating an intimate mixture of ferric oxide, sulphur and salammoniac. It is insoluble in dilute acids, but dissolves in nitric acid with separation of sulphur.

In the production of pyrite, which is found in Louisa county and is used for the manufacture of sulphuric acid employed in the treatment of wood pulp for paper-making and in the manufacture of superphosphates from phosphate rock, Virginia took first rank in 1902 with an output valued at $501,642, or 64.7% of the total yield of this mineral in the United States; and this rank was maintained in 1908, when the product was 116,340 long tons, valued at $435,522.

Iron disulphide, FeS2, constitutes the minerals pyrite and marcasite; copper pyrites is (Cu, Fe)S2.