Credit to: randomfandomrambles on tumblr. "Pink Diamond's mural is drastically different from the murals of the other three diamonds. (Go take a look) White, Yellow and Blue diamond have an ethereal floating stance. Pink's mural is standing almost as if she's freshly bursting out of the ground. To me it looks like a mural of a newly emerged diamond. Stewing on that thought I wondered where she (PD) was and what she was doing as her 'sisters' gained control of so many planets. Then the thought hit me. What if Earth was truly hers. Diamonds are quite large and are supposed to have a lot of power. A planet that had enough life to bring a diamond to life might truly be rare. A planet that was lush with life to the extreme and have vast resources would be needed. Considering the size and power of a diamond I can imagine it would create quite the impressive emergence hole on the planet they were born on. Now where on earth has there been an enormous change in geography that is missing? (Russia!) Making earth the place of a diamonds possible birth and death. To add to this: Mir Mine (Known ass the Naval of the Earth) the second largest excavated hole in the world, which produced 10,000,000 carats of diamonds per year in its hayday. This thing is so huge that the air flow can suck in helicopters. And where is it located? (Russia!)." Alright so thank to this tumblr user it helped me think of mine, as you know PD is shattered, and the other diamonds especially Blue is grieving, so what if, they are trying to recreate PD. How is that possible? Well what do you need to create a diamond? (Minerals, heat and Pressure) so that leads me to this theory: The diamonds created the cluster to form a new PD.