Silica Quartz
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Description
Silica Quartz
is a mineral with the chemical composition of SiO2 and trigonal symmetry. He is the stable form on the surface (modification) of the silica and to the feldspars, the second most common mineral of the crust.
With a Mohs hardness of 7 quartz belongs to the hard minerals and serves as a reference to which ranges up to 10 (diamond) by Friedrich Mohs scale. He is often well-developed crystals of great variety of shapes and colors (see modifications and varieties), whose crystal surfaces vitreous. Quartz has no cleavage, conchoidal breaks like glass and shows the fracture surfaces of a greasy shine.
is a mineral with the chemical composition of SiO2 and trigonal symmetry. He is the stable form on the surface (modification) of the silica and to the feldspars, the second most common mineral of the crust.
With a Mohs hardness of 7 quartz belongs to the hard minerals and serves as a reference to which ranges up to 10 (diamond) by Friedrich Mohs scale. He is often well-developed crystals of great variety of shapes and colors (see modifications and varieties), whose crystal surfaces vitreous. Quartz has no cleavage, conchoidal breaks like glass and shows the fracture surfaces of a greasy shine.
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Silica Quartz