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The chemical formula of mineral Beyerite is indicated by (Ca,Pb)Bi2(CO3)2O2. Mineral Beyerite is usually found occuring as secondary mineral associated with bismuthite. This mineral is commonly found at its type of locality at Schneeberg, Sachsen (Saxony), Germany. This mineral was named for A. Beyer. Mineral Beyerite 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.

            Mineral Beyerite has no cleavage display even if it is evaluated using petrographic polarizing microscope used in the field of optical mineralogy. Mineral Beyerite is also commonly found colored gray, gray green, yellow, yellowish white or white in hand sample. The specific gravity measure of mineral Beyerite is usually found 6.56 grams per cubic centimeters. Most crystals of mineral Beyerite are found transparent in appearance to translucent in appearance. Beyerite is usually found showing conchoidal fracture which is developed in brittle materials characterized by smoothly curving surfaces. The hardness measure of mineral Beyerite when specimen is evaluated using the Mohs scale method is usually found ranging from 2 to 3. Mineral Beyerite is also commonly found exhibiting vitreous to dull luster when viewed closely in reflected light of polarizing microscope. Mineral Beyerite is also commonly found leaving a white streak when rubbed on a white porcelain streak plate. Mineral Beyerite is commonly found showing biaxial figure when specimen is viewed closely between crossed nicols of polarizing microscope for mineralogists. It is also usually found showing 0.1600 birefringence. Mineral Beyerite is a non-radioactive mineral as evaluated.



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Friday, November 26th, 2010 at 3:34 pm
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Optical Mineralogy
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