Yellow Diamond Fashion Stylish Jewelry 47

Yellow Diamond Fashion Stylish Jewelry.

By Samina Aamir  

The majority of commercially available synthetic diamonds are yellow and are produced by so-called High Pressure High Temperature (HPHT) processes.[96] The yellow color is caused by nitrogen impurities. Other colors may also be reproduced such as blue, green or pink, which are a result of the addition of boron or from irradiation after synthesis.[97]

A round, clear gemstone with many facets, the main face being hexagonal, surrounded by many smaller facets.

Colorless gem cut from diamond grown by chemical vapor deposition

Another popular method of growing synthetic diamond is chemical vapor deposition (CVD). The growth occurs under low pressure (below atmospheric pressure). It involves feeding a mixture of gases (typically 1 to 99 methane to hydrogen) into a chamber and splitting them to chemically active radicals in a plasma ignited by microwaves, hot filament, arc discharge, welding torch or laser.[98] This method is mostly used for coatings, but can also produce single crystals several millimeters in size (see picture).[80]