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Click Here For Best Selection Of High Quality Polarizing Microscope

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The chemical formula of mineral Chesterite is indicated by (Mg,Fe++)17Si20O54(OH)6. This mineral is usually found occuring in black wallrock between chlorite and actinolite zones of a metamorphosed ultramafic body. This mineral is most commonly found at its tyep of locality at the Carleton talc quarry, near Chester, Windsor Co., Vermont, USA. This mineral was named for the locality. Mineral Chesterite 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 Chesterite is commonly found having perfect cleavage in one direction which can be seen more clearly visible when viewed closely with the aid of polarizing microscopes. Mineral Chesterite is commonly found colorless or pink brown in hand sample. The density measure of mineral Chesterite is usually found 3.23 grams per cubic centimeters. Most crystals of mineral Chesterite are found transparent in appearance. The hardness measure of mineral Chesterite is usually found ranging from 2 to 2.5 when evaluated using the Mohs scale method. Mineral Chesterite is usually found with silky to pearly luster in reflected light of polarizing microscopes. Mineral Chesterite is also commonly found leaving a white streak when rubbed on white porcelain streak plate. Mineral Chesterite is also found showing biaxial negative figure with 0.0230 birefringence found when evaluated between crossed nicols of polarized microscope for mineralogists. Mineral Chesterite is found to be not radioactive.



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Thursday, June 30th, 2011 at 3:14 am
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Optical Mineralogy
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