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The chemical formula of mineral Cobaltkieserite is indicated by CoSO4•H2O. This mineral is commonly found occurring along with the oxidation products on a museum specimen of copper-cobalt ore collected from the Bastnas deposit. Cobaltkieserite is commonly found at its type of locality at Bastnas, near Riddarhyttan, Skinnskatteberg, Sweden. Mineral Cobaltkieserite was named as the Co analog of kieserite. Cobaltkieserite is also known to crystallize in the monoclinic system of crystal formation. In optical mineralogy, the monoclinic system of crystal formation comprises crystals having three axes of unequal lengths. Two of which are usually found in a position that is oblique or not perpendicular to one another. However, both of which are commonly found perpendicular to the third axis. Cobaltkieserite is commonly found colored pink in hand sample. Cobaltkieserite is also commonly found translucent in appearance. The crystal habit of mineral Cobaltkieserite as described in the field of optical mineralogy usually includes aggregate forms. These are made of numerous individual crystals or clusters that is more clearly visible when viewed closely under polarizing microscope used in the field of optical mineralogy. Mineral Cobaltkieserite also sometimes found powdery in form with a loose, poorly-coherent pulverulent mass. Cobaltkieserite is also considered as water soluble mineral. The hardness measure of mineral Cobaltkieserite is usually found ranging from 2 to 3 when evaluated using the Mohs scale method. Mineral Cobaltkieserite is also found exhibiting earthy or dull luster in reflected light of polarized microscopes. Mineral Cobaltkieserite is also commonly found leaving a pale pink streak when rubbed on white porcelain streak plate. Mineral Cobaltkieserite is also usually found showing biaxial positive figure when evaluated between crossed nicols of polarized microscopes. Mineral Cobaltkieserite is also found not radioactive.



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Wednesday, August 31st, 2011 at 4:43 am
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Optical Mineralogy
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