DeBeers, the big diamond brokers were trying to keep them off the market for jewelry but I guess they failed..........
That’s what we were told by our locally owned jeweler we bought hers from. We’ve been using them since we bought our wedding set from them 33 years ago.
He said it was only a matter of time before the process of how to manufacture diamonds became know.
I’m surprised DeBeers didn’t somehow patent it and make it proprietary.