With the new episode posted last night, White Pearl might have once been Pink PearlMy theoryThe Pearl we know wasn't Pink Diamond's personal Pearl. Pink and Pearl became friends but Pink Pearl was as strict and straight forward as she is now and Pink Diamond didn't like this because she wanted to have fun so would often leave Pink Pearl behind or give her a task to keep her busy. when Pink Diamond was shattered and Pink Pearl was not around, she was held responsible for not being there to protect Pink Diamond and lost her eye as punishment. her missing eye is a badge of her failure for all to see. missing Pink Diamond, White Diamond took Pink Pearl as her own to remember her, but also still tortures Pink Pearl so that she'll never forget her failure. Pink Pearl's loyalty and fear of the Diamonds is the only thing keeping her from committing suicide. since the Diamonds might potentially be able to repair her shattered gem, death is not an escape. she is trapped in a living hell for all eternity.But... this is just a theory