We’ve been using man made diamands for decades in saw blades. That’s why it’s now economical to grind down the entire surface of a freeway.
However, they can only be made in sizes too small to be practical in jewelry, as far as I know.
This could be a big deal for jewelry, but probably only a slight improvement over existing man made diamonds for industrial use.
I’m typing this all from memory, so I could be all wet. It’s happened before - that I completely mis-remember a thing.
The diamonds in question are of a specific crystalline structure and not your normal type.............
They can make diamonds big enough for jewelry only federal law prevents them from being marketed as diamonds. Manufactured diamonds are virtually indistinguishable from natural, except they are perfect of nearly perfect and are relatively inexpensive to make.
The diamond jewelry industry is a joke. If not for De Beers diamond cartel artificial restricting supply with the help of law, diamonds would cost a small fraction of what they do.
Pure Grown Diamonds (Gemesis Inc) announced the world’s largest lab-created diamond in April 2013, broke that record in November 2013, and then broke the record again in July 2014. The first was a 1.29 carat emerald cut, the second was a princess cut at 1.78 carat,[13] and the third was a 3 carat round brilliant white Type IIa diamond.[14]
https://en.wikipedia.org/wiki/Pure_Grown_Diamonds