Again, I'm all for lab grown diamonds for both consumer and industrial use.

I think "lab-grown" is a pretty neutral term, and it is also scientifically accurate in the case of CVD and other diamonds where the process really is "growing" the diamonds. There are certainly other terms for them that sound more derogatory such as "synthetic" or "artificial" diamond.

On the radio, they advertise them as artisan-crafted diamonds.