If 2 of your close buddies are getting themselves seriously hurt, fighting over what that seems like a piece of uncut diamond when it's really just one very hard and compressed piece of shit?
(assuming that you are an expert in gemstones and rocks, and that that piece of shit IS really a piece of glittery shit. )
Would you:
(a) Tell them both to stop, stating your reasons and subsequently get stoned by them for doing so. Then, they continue fighting.
(b) Let them be and watch them bleed until your guilt kills you before the loss of blood kills them.
(c) Laugh and walk away. Only fools will fight over that. They reap what they sow.
(d) others?
...