Well it looks like you guys enjoy my Steven Universe headcanons so have some more!

So I was thinking about Pearl and the theory that she’s only one of many pearls and all that jazz. And then I was also thinking about Mother of Pearl (or Nacre as it’s otherwise called) and how that could fit with Pearl and this character is what I came up with.

Her name is Nacre and she served the Diamonds many, many ages ago as a powerful general. While she respected all three Diamonds (at the time there were only three) she held White Diamond in the highest regard and had the utmost respect for her. For unknown reasons, after a time, the Diamonds decided that they need a fourth Authority and began grooming Rose Quartz for the role. Nacre was appointed her chief tutor but Rose was an arrogant, spoiled, self entitled young Gem and refused to learn anything from Nacre. They quickly settled into hating one another. Years later, when asked by White Diamond for her recommendation regarding Rose, Nacre said that she doubted that Rose would ever be worthy of the title of Diamond. However, despite Nacre’s protests, Rose was made a Diamond.

Her confidence in White Diamond’s wisdom now shattered, Nacre began to question other aspects of the Diamonds and whether or not they were still worthy of her respect. In the end she decided that they were not and began contemplating revolt. Unfortunately she shared her ideas with the wrong Gems and word made it back to the Diamonds. They had her assassinated for her treachery but it didn’t end there. They took her now shattered gem and ground it up then took each grain of it and coated it various gem-like substances until it was a new, complete gem, namely, a Pearl.

Now, thousands of Pearls serve Homeworld by carrying out the humblest and often the most humiliating of tasks without question or protest, further compounding the punishment of the once proud and powerful Nacre.