This is pretty far down the list as far as reasons to not buy diamonds. They’re not rare. They’re not special. It’s a rock with limited industrial use.
For added context, they’re still cutting the hands and feet off of dependents (including children) of miners to ensure they work hard.
no window (feddit.de)
South African diamond miner being x-rayed at the end of his shift to prevent theft, 1954 (lemmy.world)