I only just noticed that Pink isn't glowing like the other three. It's a lot more obvious on my smaller phone screen.
@Gisk Seeing Pink Diamond in the mural only holding up Earth, which has only one dot by it, I would infer that the small dots placed by larger circles are supposed to be that planet's moons. As well, you can actually see what kind of planet the diamonds captured. The size of the circles, as well as the lines crossing through a few of them, could very well indicate their actual size compared to other celestial bodies and if they have rings (like Uranus or Saturn). The lines could also represent a planet's axis.

@Peridot I like her. She seems like an interesting character that may have the balls to slap Bloodstone if she hears any of what he has done.
@Gisk I'm sorry but Cat's Eye is already taken. Halting has claims to Cymophane which is the scientific name for Cat's Eye.