[quote=@Neurovoid]
<Snipped quote by RBYDark>

I'm 100% sure that Rose never killed pink diamond but poofed her and put the gem into a lion and made her a slave.
[/quote]

I believe that's what we call Laser-Guided Karma.
[s]Of course, the only alternative I can think of is that Pink Diamond wasn't as corrupt as the other Diamonds and saw Rose's rebellion as an excuse to start over. So turned into the Lion willingly.[/s]