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Click Here For Best Selection Of High Quality Polarizing Microscope

Click Here For Best Selection Of High Quality Polarizing Microscope

The chemical formula of mineral Jeffreyite is indicated by (Ca,Na)2(Be,Al)Si2(O,OH)7. Jeffreyite is commonly found in a cavity in a highly calcium-metasomatized granite dike. This mineral is commonly found at its type of locality at Jeffrey mine, Asbestos, Quebec, Canada. Named for the locality. Jeffreyite is known to crystallize in the orthorhombic system of crystal formation. Mineral Jeffreyite is commonly found showing perfect cleavage in two different directions. Mineral Jeffreyite is commonly found colorless in hand sample. The density measure of mineral Jeffreyite is usually found 2.99 grams per cubic centimeters. Most crystals of mineral Jeffreyite are found transparent in appearance. Mineral Jeffreyite is commonly found showing brittle fracture. This is generally displayed by glasses and most non-metallic minerals. The hardness measure of mineral Jeffreyite is usually found 5 when evaluated using the Mohs scale method. Mineral Jeffreyite is commonly found exhibiting vitreous or glassy luster when viewed in reflected light of polarizing microscopes for mineralogists. Mineral Jeffreyite is commonly found leaving white streak when rubbed on white porcelain streak plate. Mineral Jeffreyite is found to be showing biaxial negative figure with 0.0180 birefringence when evaluated between crossed nicols of polarizing microscopes used in the field of optical mineralogy. Jeffreyite is commonly found not radioactive.



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Friday, September 30th, 2011 at 2:11 am
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Optical Mineralogy
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