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The earliest manufacture was pieces of polished stone such as obsicidian natural occuring volcanic glass
they were aroud from 6000 BC of copper were crafted in mesophitomia
metal coated glass mirrors are said to have been in sidon in 1st centuary
glass mirrors backed with gold leaf were used by romans
china people began making mirrors with the use of silver mercury and amalgam
the invention of the silver glass mirror is credited by germany
now  a days mirror were decomposed directly on the glass substances

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