Treating diamonds to change the color

Regarding treating diamonds to change the color, EGL labs has done a
lot of studying on this one. I did an article in New York Diamonds
recently. If you want to write me directly, I’ll send a copy of it.
It was also written about in JC-K. It’s not something you cook up
in your studio – the process is under extremely high heat and
pressure, nearly as much as it takes to make a diamond.