If I understood this correctly, it does not print diamond material. It prints a preform that can later be turned into synth diamond by the usual processes. But that wouldn’t make such a catchy headline, eh?
Very poor writeup. Talks about ceramics and never mentions when diamonds come into the process or how.
Synthetic diamonds are made under very high pressure and heat, this seems to bypass both. I will read the article later when I am on something bigger than my phone but synthetic diamonds production mimics natural diamond creation process.