Board Thread:General Discussion/@comment-764567-20150316044142/@comment-26205636-20150319171232

Great Job, I support this theory, it even provided me with enough evidence to consider White and/or Blue being trapped on Earth. However, I would still have doubts:

"To support the theory of the Authority being so broken apart, first of all we should ask why would Jasper mention only Yellow Diamond would be interested in seeing what became of Rose Quartz?"

Jasper could have only mention Yellow Diamond because she is apart of Yellow Diamond's faction. I personally don't view the Diamond Authority as a "federation" of factions ruled by cooperating Trivumerate Diamonds but as a "Confederation" of factions ruled individually by Trivumerate Diamonds who only work together to maintain their own place at the top of Gem society. In which case, they would each be looking for ways to undercut the others power in order to expand their own sphere of influence similar to Frieza and Cooler in "DBZ".

"...wouldn't all of the Diamonds want to see what became of their most hated foe that gave them and their forces a thorough whooping on a backwater world like Earth?..."

Not necessary, if they thought they hated foe was destroyed, it would not have taken them 6000 years to return to Earth in order to restart the Kindergarden. Also by looking at Jasper's treatment of Lapis Lazuli, it is quite possible that Yellow Diamond's faction simply got to and captured Lapis first since Jasper was treating Lapis roughly before she even knew Lapis withheld information. Lapis, being blue, may have been trying to report to Blue Diamond (then again if there was a coup menitioning Blue Diamond on the homeworld would have raised red flags among Yellow Diamond).

"A secret plot to allow Yellow Diamond to use the conflict on Earth as a way to rid herself of her two sisters on Earth, cover it up discreetly by trying to wipe out all Gems on the planet, and keep command of the Homeworld all to herself? "

Based on the Rariety=Power theory, Yellow Diamond would have motivation to remove her sisters, She would probably be the weakest of the three diamonds. This actually supports your argument.

" Perhaps the power of Blue Diamond's gem was dangerous. In either case, it was too dangerous to keep bubbled in the Temple. If the bubble ever broke, Blue Diamond herself would return."

This is contradictory, Blue Diamond was too powerful to be kept in the temple so Rose thought it was better to hide it in a light house above the Temple which it can possess and where humans can get access to it. Even if Rose knew Blue Diamond was in the Light house she probably would have tried to prevent humans from entering it. Yet two kids (Lars and Ronaldo) were able to get in and presumably awaken Blue Diamond. Since they were both kids at the time, it decreases the liklihood that Rose was gone at the time but it still possible that Steven was a baby or very younger at the time of this event.

"It was the perfect cover up for Yellow Diamond's coop. Soon, Earth would be forgotten, and with it any memory of what happened to her sisters. Gem Homeworld would be all hers, for eternity."

It was the perfect cover-up yet she kept the same emblem. If you are trying to cover-up your coup d'tat, why would continue to use the same emblem of the GDA. You would remove the blue and white triangles and increase the size of the yellow triangle to signify the rule of the Yellow Diamond Authority in all new and old ships (Peridot's ship, I assume is more modern since the tech is unrecognizable to the Crystal gems).

That being said imagine if that theory is true, it would mean utter chaos. It would also mean that Yellow Diamond activated her "Doomsday" weapon when Rose was fighting the two diamonds (This could mean that Rose did not defeat the diamonds but instead just outlasted them since she was able to shield herself and her closest friends. So if the two diamonds on Earth, both are reactivated, they could easily destroy the Crystal Gems before turning their attention to Yellow Diamond. It would also throw into question the true loyality of Lapis Lazuli, if Blue Diamond returns (her presumed superior) would she support the homeworld or Steve since Blue Diamonds return could mean the return of a homeworld that is more familiar to her. However, the reactivated diamonds may still need time to recover (but that could reduce the show to a standard good vs. evil action show like every other action show on TV).

The Dollar seen in "Keep Beach City Weird" is either an example of cultural memory or an example of the continued influence of the Diamonds on planet Earth which should not be possible if they are both inactivated and Yellow Diamond is content on ruling the Homeworld.

In the end, I can not argue against your strongest evidence which is actually the diamond cuts of the "Serious Steven" and "Horror Club" episode gems. This extremely raises the possiblity that they are ,in fact, diamonds or at the least, very high ranking gems (i.e. Colonel rank) but I can not find any other gem that is cut in a similar fashion.