Before I start off I am writing this for a friend of mine.This didn't happen to me.So my friend was in a head shop (RareWare297) and then a diamond popped into his inventory.He looks at it and it says

.Then he dies and tries to respawn but keeps dying over and over again.I don't know why this happens to him but it does.I think you should clear his inventory his name in RareWare297.Thats all bye

 

This is the exact same thing that had happened to me too. The diamond of death was given to me by my friend named Buntobaga. There is basically nothing you can do. Minechat doesn't work but try Macros Keybinds.

 

So he is just plainly doomed D:

 

:'(

 

If the problem wasn't resolved, try going to Buycraft and purchasing this,http://gyazo.com/b853bc4d64531802b7656f85fd70a291. (It is free).