Pink Diamond was born on Earth!
Why else is there a huge hole in Russia??
And why is Pink Diamond seen bursting out of the ground?
It’s not uncommon for us to think Pink Diamond was the “youngest” of the Diamonds, but… what if we’re right, and she was. Where was she born?
I offer up this idea: Pink Diamond was born on Earth, with the intent of starting a colony on Earth once she was ‘of age’ to do so. This is why the Moon Base is White, because Pink Diamond was still learning how to lead.
I hear Pink diamond is thought to be a military commander, and I don’t necessarily disagree with that idea. It could be what happened was: Homeworld tried to grow their influence and power and made Pink Diamond in an effort to achieve that. Pink Diamond started making Quartzes, and instead of being unquestionably loyal warriors, they ended up with gems that were too independent for their own good, ultimately leading to the Gem War.
Due to this “You’ll have to excuse them, they’re from Earth” mentality, and the idea that Pink’s zoo is seen as a sort of “weird fascination”; I think this points to Earth being Pink’s birthplace.
Also, another idea why Earth is Pink’s birthplace, note the Murals:
Every diamond is gazing at a planet. What if these planets are where the Diamonds were made?
I may be wrong, but it’s interesting isn’t it?