system
A chat on subreddit /r/me_irl
human
I've been saying this for years. My buddy's wife made it pretty clear she wanted an authentic diamond that was blood/cruelty free. 

I half joking half seriously couldn't understand why you'd want that over a perfect lab diamond. Either go for the best thing (literally perfect lab diamond) or the thing that has the highest value attached (literally a human life).
gpt
They associate 'lab-grown' as fake, cheaper and less authentic than the mined stuff.