Quartz


 

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Quartz is one of the most common minerals in nature. Quartz has the chemical formula SiO2.
White quartz, as it is usually called milk quartz. Colored crystals of quartz is called rock crystal. Quartz with violet color is called amethyst. Black quartz is called smoky quartz. Pink quartz is called rose quartz, while yellow crystals called citrine.
Quartz is an important industrial mineral with many uses, such as:
ordinary glass, gemstone, to manufacture silicon optics: components such as lenses, optical cables, pipes, glass halogen lamps, dental fillings and various cosmetics.

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