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The chemical formula of mineral Calciborite is indicated by CaB2O4. This mineral is usually found as drillcore into a contact metasomatized limestone near a quartz diorite intrusion associated with a copper deposit in skarn. Mineral Calciborite is most commonly found at its type of locality at Novofrolovskoye copper deposit, near Krasnoturinsk, Turinsk distric, Northern Ural Mountains, Russia. Mineral Calciborite 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 Calciborite has no cleavage display even if it is closely evaluated using the petrographic polarizing light microscope used in the field of optical mineralogy. Mineral Calciborite is most commonly found white in hand sample. The specific gravity measure of mineral Calciborite is usually found 2.878 grams per cubic centimeters. Mineral Calciborite is most commonly found showing conchoidal to uneven fracture when evaluated under polarizing microscope used in the field of optical mineralogy. This is actually an uneven fracture producing small, conchoidal fragments. The hardness measure of mineral Calciborite when the mineral is evaluated closely under polarizing microscope is usually found 3.5. Mineral Calciborite is commonly found leaving a white streak when rubbed on a white porcelain streak plate. Calciborite is commonly found showing biaxial negative figure when rubbed on a white porcelain streak plate. Mineral Calciborite is also showing 0.0750 birefringence.Calciborite is a non-radioactive mineral as evaluated.

 



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Monday, August 30th, 2010 at 6:05 am
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Optical Mineralogy
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