Board Thread:General Discussion/@comment-26205636-20150316011547/@comment-26189598-20150316155024

I agree with the theory that Yellow Diamond is one of the unknown figures from the mural. I also believe that the fire might represent a sun-like object. So Yellow Diamond might possess light-based powers, fitting as diamonds are associated with light.

But we can take this theory even further by theorizing that the three unknown gems represent the three different colored triangles that were seen on the Gem Warship. Since Yellow Diamond has already been confirmed, it's very likely that Blue and White Diamond also exist.

If we were to connect the white and blue triangles from the ship to the gems from the mural, Blue Diamond would be the gem on the far left with a triangle behind her head. Her power is too hard to decipher, but it probably has something to do with controlling other beings.

And White Diamond would be the gem fighting Rose Quartz. She seems to have the power of "krystalokinesis", which means she has the ability to manipulate crystals, demonstrated by using them as shrapnel and raising obelisks from the ground. I can see her as the leader of the Diamonds as well as the Homeworld Gems because of her crystal motif, and would therefore be the series' true antagonist.

Let's hope that Season 2 sheds more light on these unknown beings, and the rest of gemkind. It might even change how we perceive the Crystal and Homeworld Gems.