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Yemen Jewellery Diamond Engagement Ring.

Posted by Euro Jewellery Fashion
8:56 PM


Yemen Jewellery Diamond Engagement Ring. 

By Aamir Mannan.

Later, from 1965 to 1970, the  Linde Division of Union Carbide produced completely synthetic emeralds by hydrothermal synthesis. According to their patents (attributable to E.M. Flanigen) acidic conditions are essential to prevent the chromium (which is used as the colorant) from precipitating.

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