A personal favourite in blue diamond engagement rings
I suppose since blue is my favorite color, i like blue diamond engagement rings the most!! On that note i might as well include blue diamond jewelry.
The blue color in the diamonds is cause by trace amounts of Boron in the stones Structure.
Most of the blue diamonds were traditionally from India. However, there are now african blue diamonds which have recently been discovered.
Some Blue diamonds are natural Semi-Conductors; they actually conduct electricity.
This is unusual as most diamonds are excellent electrical Insulators.