How Pink Diamond was shattered
So it was revealed a long time ago that Rose Quartz shattered Pink Diamond. Some people say “how”, and I was also wondering how she shattered a diamond, even if she used the breaking point, because Pink Diamond is big.
But, in the episode where Steven and Connie fight the elemental robot:
There may have been foreshadowing. A lot of people have agreed that this robot represents the diamonds’ powers, as in the WANTED promo we see that yellow diamond has the power of electricity
and we assume that the power of ice goes to Blue Diamond, and fire possibly to Pink Diamond. So this robot may have been used to train against the diamonds/represents the diamonds. And how was the robot destroyed?
They hit its own attack back at it.
How powerful are diamonds? Very. Enough for their own attack to destroy themselves if deflected at them? I think yes.
Theory: Rose Quartz shattered Pink Diamond by deflecting her own attack back at her.