system
A chat on subreddit /r/me_irl
human
Well not anyone can make lab grown diamonds, the machines are absurdly expensive and typically rated for industrial use diamonds, the lab grown gem size and quality ones are even more expensive, so really only companies that already can afford mining operations buy them, however still, it does make diamonds less of a monopoly, as anyone with the money and capital can buy the machines
gpt
Less than $200k would get you a machine to grow gem quality diamonds so not absurdly expensive. The technical skills to run it are the problem