[beardyw]

This would bring the price down:

Mercury could have an 11-mile underground layer of diamonds, researchers say | CNN

https://www.cnn.com/2024/07/31/science/mercury-diamond-under...

[ErigmolCt]

If this finding is confirmed and if such diamonds could be accessed

[PhasmaFelis]

Diamonds are artificially scarce anyway. The big producers stockpile their output to keep prices high, and spread FUD about dirt cheap, just-as-good synthetics.