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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of the mineral Hessite is indicated by Ag2Te or Silver Telluride. Mineral Hessite is actually a Sulfide. Hessite is generally found having gray colored crystals, which are most commonly found splendidly exhibited under petrographic polarizing light microscope. These gray colored crystals are usually pseudo-cubic in form despite the fact that mineral Hessite crystallizes in the monoclinic system of crystallization. Hessite really is known to crystallize in the monoclinic system. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. First Hessite mineral specimens were found in Kazakhstan. Mineral Hessite was named after Germain Henry Hess, the nineteenth century Swiss chemist and also a Professor of St. Petersburg Mining Institute. Professor Hess was the first one to analyze the first specimens of Hessite mineral. And in 1829, Gustav Rose recovered some of the Hessite mineral specimens that were studied by professor Hess. The silver telluride is the synonym of Hessite and it is chemically accurate but not very alike as mineral.

 

Most Hessite mineral crystals are found opaque in appearance. The crystal habit of the mineral Hessite usually include pseudo-cubic to prismatic crystals that are commonly found more clearly visible when evaluated with the aid of petrographic polarizing light microscopes. It can be also found in fibrous form that is usually splendidly exhibited under polarized light microscopes. Sometimes Hessite is also found in massive forms. The sectility and associations of Hessite is among its diagnostic properties. Hessite is most commonly used as mineral specimen and it is most often found exhibiting nice and wonderful microscope images when evaluated with the aid of petrographic polarizing light microscopes.

 

            Mineral Hessite is most commonly found in steel gray to lead gray color that is usually very interesting when examined under polarizing microscopes used in optical mineralogy. Hessite is most commonly found exhibiting a metallic luster in reflected light of polarized microscope. Hessite is also usually found with indistinct cleavage in lone direction when viewed under optical mineralogy polarizing microscopes. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually ranging from 1.5 to 2. The fracture that is found when mineral Hessite is evaluated under polarized microscope is usually uneven. The specific gravity measure of Hessite is usually found ranging from 8.2 grams per cubic centimeters to 8.3 grams per cubic centimeters, which is much heavier than average for metallic minerals. When the specimen of Hessite is rubbed on a white porcelain streak plate, it is most commonly found leaving a gray streak.

 

            Mineral Hessite is also an anisotropic mineral species. In optical mineralogy, this means that it consequently appears alternately dark and illuminated when viewed between crossed nicols of petrographic polarizing light microscopes. They actually exhibit distinct dark orange to dark blue colors when viewed in plane-polarized light of polarizing light microscope as described in the field of optical mineralogy. Specimens of Hessite are generally found sectile. In optical mineralogy, this means that the crystals of Hessite specimen can be easily scraped with a knife or blade. There is no specific data found on the toxicity and health dangers for mineral Hessite. However, the specimens of this mineral species should be treated with great care and use of sensible precaution is advised upon handling them.

 

The best field indicators of mineral Hessite usually include density, crystal habit, softness, and locality, lack of good cleavage, color and sectility. Hessite is most commonly associated with other interesting minerals including quartz, gold, petzite, galena, altaite, pyrite, sylvanite, chalcopyrite, chlorargyrite, sphalerite, chlorite, tetradymite, keystoneite, thalcusite, silver, coloradoite, tellurium and other sulfide minerals. Mineral Hessite is most commonly found in hydrothermal veins. Hessite notably occurs at several types of localities including Romania, Mexico, Kazakhstan, Quebec in Canada and some areas in the United States including New Mexico, Nevada, Colorado, South Dakota, Arizona, California, Utah and Wisconsin.



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Tuesday, July 29th, 2008 at 7:24 am
Category:
The Sulfides Mineral Class
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