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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Valentinite is indicated by Sb2O3 or Antimony Oxide. Valentinite actually belongs to the Oxides and Hydroxides mineral class. Valentinite is also considered as a minor ore of antimony and it is also commonly used as mineral specimen. Valentinite is usually found showing nice and interesting microscope appearance when viewed with the aid of petrographic polarizing light microscopes used in the field of optical mineralogy. Valentinite is a high lustered and often fibrous oxide mineral that appears very interesting when viewed under polarizing microscopes. Valentinite is most often found forming sprays of crystals that are usually matted to the host rock in radiating clusters and it is usually appears very splendid when viewed under polarizing microscopes used in the field of optical mineralogy. The adamantine or almost gem-like to pearly luster of mineral Valentinite serves to add a nice quality to this uncommon antimony mineral.

             Valentinite is known to be dimorphous with the other mineral called Senarmontite. In the field of optical mineralogy, dimorphous means, the two minerals have exactly the same chemistry but they have different structures. Mineral Senarmontite is known to be isometric while Valentinite is orthorhombic. Valentinite is associated with Senarmontite and also with stibnite. The association is actually of no surprise because it has been known in optical mineralogy studies that both minerals are oxidation products of the antimony sulfide. Valentinite is most commonly found colorless, white, gray, reddish or yellow in appearance, all of which are very beautiful when specimen sample is evaluated and closely viewed with the aid of polarizing microscope used in optical mineralogy. Valentinite is most commonly found showing adamantine or pearly luster when viewed in reflected light of polarized microscopes for mineralogists. Most crystals of mineral Valentinite are found translucent to opaque in appearance most especially the more massive specimens. Valentinite is known to crystallize in the orthorhombic system of crystal formation. In optical mineralogy, this orthorhombic crystal system comprises crystals having three mutually perpendicular axes, of which all are of different lengths.             The crystal habit of the mineral as described in the field of optical mineralogy usually include prismatic to fibrous and compact aggregates forming tufts and radiating sprays that can be found more splendidly exhibited when viewed with the aid of petrographic polarizing microscopes. It can be also found massive and granular in form. Individual crystals of mineral Valentinite are actually complexly faceted and are truly fascinating when viewed under polarized microscope. Mineral Valentinite is most commonly found showing perfect cleavage when viewed under polarizing microscope for mineralogists. it also exhibits uneven fracture when closely evaluated with the aid of polarizing microscope used in optical mineralogy. The hardness measure of the mineral when it is evaluated using the Mohs scale method is usually ranging from 2.5 to 3. Valentinite specimens are most commonly found leaving a white streak when rubbed on a white porcelain streak plate. The specific gravity measure of the mineral is approximately 5.7 grams per cubic centimeters, which is actually heavier than the average. Valentinite is usually found associated with other interesting minerals including stibnite, quartz, native antimony, kermesite, Senarmontite and many other antimony minerals. The best field indicators of mineral Valentinite usually include high luster, specific gravity, crystal habit and associations. Mineral Valentinite notably occurs at several localities including France, Bolivia, Germany, Canada, Algeria and Czech Republic.



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Wednesday, September 30th, 2009 at 3:43 am
Category:
The Oxides and Hydroxides Mineral Class
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