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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Samarskite – (Y) is indicated by (Y, Ce, U, Fe)3(Nb, Ta, Ti)5O16 or Yttrium Cerium Uranium Iron Niobium Tantalum Titanium Oxide. This mineral Samarskite – (Y) is classified under the Oxides and Hydroxides mineral class. Samarskite – (Y) is also considered as a minor ore of rare earth elements and uranium. It is also sometimes cut for gemstone purposes. Samarskite – (Y) is also used as mineral specimen and it is most often found showing nice and interesting microscope images when closely evaluated with the aid of petrographic polarizing light microscopes used in optical mineralogy. Samarskite – (Y) is only one of the several rare earth oxides that form from the leftover elements that other minerals seem to not want.

 

            Its being a gemstone mineral is quite odd about Samarskite – (Y). Mineral Samarskite –(Y) can be cut into attractive gems and used as cabochons despite the fact that it is slightly radioactive. Hence, their use as wearable gemstone is quite risky. Mineral specimens of Samarskite –(Y) can be actually a nice addition to one’s own collection of minerals. Good Samarskite crystals are rare, but the prize is high enough when found. Although the color is usually just a velvety black, the luster is generally high and striking. It should be of great importance to note that this mineral is slightly radioactive. Thus, it should be stored away from other minerals that are subject to damage from radioactivity and human exposure should be limited.

             Samarskite – (Y) is usually found dark pitchy to velvety black to dark brown. This could be found more interesting when viewed with the aid of polarizing microscopes for mineralogists. mineral Samarskite – (Y) is also usually found vitreous to resinous and fresh surfaces can be found showing submetallic luster in reflected light of polarized microscopes used in the field of optical mineralogy. Most crystals of mineral Samarskite – (Y) are actually found nearly opaque in appearance. The crystal habit of mineral Samarskite – (Y) as described in the field of optical mineralogy usually include stubby prismatic crystals often embedded in the matrix of the host pegmatite. It is also found granular or massive in form for quite some time. Samarskite – (Y) is also 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. 

            Mineral Samarskite – (Y) is usually found showing poor cleavage in one direction which can be found more clearly visible when viewed with the aid of petrographic polarizing microscopes for mineralogists. It is also found showing conchoidal fracture when 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 5 to 6. Samarskite is also most commonly found showing reddish brown streak when rubbed on a white porcelain streak plate. The specific gravity measure of the mineral is approximately 4.3 to 5.87 grams per cubic centimeters, which is heavy for non-metallic minerals. The extreme variation is usually caused by variable composition of component metals. As mentioned above, mineral Samarskite is a slightly radioactive mineral and crystals or specimens of this mineral are often coated with a limonite like the earthy coating.      

 

            Mineral Samarskite – (Y) is usually found in rare earth rich granite pegmatites, a slow cooling igneous intrusive rock known by mineralogists in optical mineralogy. Samarskite is most commonly found associated with other interesting minerals including quartz, tantalite, columbite, feldspars and other rare earth minerals. It is also known that mineral Samarskite is common enough and locally abundant enough that it has potential to be a valuable resource for its rare earth metals. The best field indicators of mineral Samarskite usually include fracture, color, radioactivity, luster, associations, specific gravity, streak and environment. Samarskite notably occurs at several localities including the Ural Mountains of Russia, some areas in Sweden, Norway, Brazil and also some areas in the United States.     



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Monday, September 14th, 2009 at 2:10 pm
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The Oxides and Hydroxides Mineral Class
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