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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Kermesite is indicated by Sb2OS2 or Antimony Oxysulfide. Kermesite is actually a Sulfide mineral. Kermesite derived its name from the Persian word qurmizq, which later became crimson and was given to the mineral’s color that usually ranges from cherry red to deep red bordering on black. Kermesite mineral species was first described in 1843 from its type of locality at Saxony, Germany. Kermesite is known to crystallize in the triclinic system of crystal formation. In optical mineralogy, this triclinic crystal system commonly comprises crystals having three axes, of which all are unequal in length and are positioned oblique to one another.


Kermesite is considered as a very minor ore of antimony. And as an ore mineral, Kermesite usually exhibits nice and interesting appearance when viewed with the aid of an ore polarizing light microscope. Kermesite is also used as mineral specimen and it is most often found exhibiting wonderful microscope appearance when viewed under polarizing microscopes used in optical mineralogy. Mineral Kermesite is an unusual mineral that belongs to the Sulfides. This can be noticed with a close look to its chemical composition. An oxygen can be found nested between the two antimonies and the two sulfurs. It also turns out that mineral Kermesite is actually an intermediate oxidation product between stibnite and many other various antimony oxides. When mineral Stibnite is exposed to oxygenated fluids under the right conditions, it will then slowly transform into mineral Kermesite. The oxygen then replaces one of the sulfurs in the chemical formula of the mineral. The oxidation process is said to be complete if the sulfurs are completely replaced by oxygen. But in the case of Kermesite, the oxidation stops short and forms mineral Kermesite.


            Mineral Kermesite is actually a very colorful mineral species that could appear more interesting when viewed with the aid of the polarized light microscope for mineralogists. It has a bright red color that has been best described as cheery red and of course considered pretty accurate to describe Kermesite. Kermesite is most commonly found exhibiting fascinating appearance when viewed under petrographic polarizing light microscopes used in optical mineralogy. The wonderful color of mineral Kermesite is caused by the stibnite and it is therefore inherent in the said mineral. Mineral Kermesite has many alternate names or nicknames. Among these are the red antimony, purple blende and the antimony blende for non-colorful Kermesite crystals.


            Mineral Kermesite is most commonly found showing magnificent and fascinating cherry red to red color most especially when evaluated with the aid of polarized light microscope used in optical mineralogy. Kermesite is also commonly found showing adamantine luster when specimen is closely viewed in reflected light of petrographic polarizing microscope used in optical mineralogy. Kermesite is also most commonly found showing perfect cleavage in one direction that is usually more clearly exhibited when viewed under polarized microscopes for mineralogists. The specific gravity measure of the mineral usually gives an approximate value ranging from 4.5 grams per cubic centimeter to 4.8 grams per cubic centimeter, which is considered heavy for translucent minerals. The hardness measure of Kermesite when it is evaluated using the Mohs scale method is usually found ranging from 1.0 to 1.5. Kermesite is most commonly found leaving a brownish red streak when specimen of mineral is rubbed on a white porcelain streak plate.  


            Most Kermesite mineral crystals are found translucent to rarely transparent in appearance. The crystal habits of the mineral usually include sprays or tufts of aggregated prismatic crystals and crusts that are usually majestically exhibited under geological polarizing light microscopes.       Kermesite is commonly found showing biaxial positive figure when mineral is evaluated between crossed nicols of petrographic polarizing microscopes used in optical mineralogy. The refractive index of Kermesite mineral is commonly found ranging from 2.720 to 2. Kermesite also shows a very high surface relief when it is evaluated under several adjustments on the aperture diaphragm of the polarizing microscope used in optical mineralogy. The maximum birefringence exhibited by Kermesite under polarized light microscope is usually 0.020. Kermesite also exhibits a relative strong dispersion under polarizing light microscopes for mineralogists. Mineral Kermesite is also a pleochroic mineral and is commonly showing interesting cherry red color when viewed between crossed nicols of polarizing light microscopes used in optical mineralogy. Kermesite also shows a very strong to extreme anisotropism when viewed between crossed polars of petrographic polarizing microscopes. In the field of optical mineralogy, anisotropic means it appears alternately dark and illuminated when evaluated between crossed polars of polarized microscope viewing at different angles. There is no specific data found on the toxicity and health dangers for mineral Kermesite. However, the specimens of this mineral species should be treated with great care and use of sensible precaution is advised upon handling them. Kermesite is a non-radioactive mineral species.


            Mineral Kermesite is most commonly found associated with several interesting minerals including stibnite, and various antimony oxides such as senarmontite, stibiconite, and valentinite. The best field indicators of mineral Kermesite usually include streak, softness, color, luster, and associations. Mineral Kermesite is considered as a secondary mineral, as an alteration of stibnite, in antimony deposits. Kermesite also notably occurs at several localities including Wolfe County, Quebec in Canada as well as Algeria and Sonora, Mexico and also Nova Scotia.

Monday, February 16th, 2009 at 2:46 am
The Sulfides Mineral Class
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Click Here For Best Selection Of High Quality Polarizing Microscope