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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of the Smoky Quartz mineral is indicated by SiO2 or Silicon Dioxide. Smoky Quartz is actually the black or brown variety of Quartz. It is actually a Silicate mineral. Smoky Quartz is most commonly used for gemstone purposes and also as ornamental stone. Smoky Quartz actually exhibits very interesting microscope images under petrographic polarizing light microscope used in the field of optical mineralogy. Smoky Quartz is actually a popular variety of Quartz. It has unusual black or brown color for a gemstone but is is easily recognized in the general public and most of all in the mineral world. Smoky Quartz is a very interesting piece of material that is usually used or cut for gemstone purposes. Smoky Quartz is also a very popular ornamental stone and it is usually carved into spheres, pyramids, eggs, figurines, obilisks and ornate statues.

 

            Smoky Quartz is most commonly found black to dark brown in color that could still be very interesting when viewed with the aid of polarizing microscopes used in optical mineralogy. The index of refraction of the mineral is usually ranging from 1.544 to 1.553. Smoky Quartz can be also found showing 0.009 birefringence when specimen is closely evaluated with the aid of petrographic polarizing microscopes. The hardness measure of Smoky Quartz is usually found 7 when specimen sample is evaluated using the Mohs scale method. It has no visible cleavage even when it is closely evaluated using the petrographic polarizing microscope used in the field of optical mineralogy. Smoky Quartz is known to crystallize in the trigonal system of crystal formation.  

             The color of the Smoky Quartz is variable from brown to black and is sometimes put in question but it is certainly related to the amount of exposure to radiation that the stone has undergone. Natural Smoky Quartz specimens are often found in granitic rocks which have a small but persistent amount of radioactivity. Natural Smoky Quartz can be found in many places around the world including Brazil, Colorado and the Swiss Alps.



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Sunday, August 30th, 2009 at 3:50 am
Category:
The Silicates Mineral Class
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