The first person hedged their statement with "I heard once" so it's likely true regardless of whether the rest is accurate.

In a similar vein it has been said (by me, just now) that DeBeers is actually already out of diamonds and manufactures then de novo from the compressed ashes of orphans.

I heard that De Beers donated 99.6% of all of their profits so I am not sure what all the hoopla is about them

Effective altruists concur.

Right but I heard that the recipient of the donation was the Epstein-Trump Boarding School For Children.

Well, I heard it was the Epstein-Trump Boating School For Children, which taught vulnerable youngsters how to get away from Epstein’s child-rape island.

Unfortunately, you misheard. It was the Epstein-Trump Motorboating School For Children, and what was taught was...not what you said.

I actually lol’ed :-)

I'll provide a citation since I'm in this industry and watch it closely.

De Beers currently has about 2 billion worth of diamond stock in its holds. This equates to about... 5-6 months of sales volume. It used to be worth more but lab-grown and other re-valuing initiatives have dropped the worth of their hoard.

AI coughed up a bunch of references that put their stockpile estimate at around a year. Might have been more at one time but nothing close to 100.