The Great Diamond Authority

"The Diamonds, unique in their flawlessness, sought to expand their perfection across the galaxy."

The Great Diamond Authority is the matriarchal body of Gem leaders who rule in absolute power over the Gem Homeworld and its remaining colonies.

Overview
The Great Diamond Authority has complete control and authority over every Gem and the Gem race's endeavors. Each Diamond seems to be responsible for overseeing a specific part of Homeworld society. The Diamonds appear to split up Gems into groups; some Gems belong to Yellow Diamond, others to Blue Diamond, and (presumably) others to White Diamond. Gems wear a colored Diamond emblem on their outfit that corresponds to the Diamond they serve.

In order to expand the Gem race, the Diamonds take control of planets for colonization purposes. Each Diamond owns specific colonies and are in charge of making sure it is successful; for example, Pink Diamond owned Earth.

Loyalty
Most Gems are very loyal and legitimately believe that the Diamonds are the most elite beings to ever exist. Some members are passionate and enthusiastic about working for a Diamond. For example, Peridot once exclaimed, "I'll never forsake the Gem I was made for!", and Holly Blue Agate openly spoke of Blue and Yellow Diamond's greatness.

The loyalty Gems have for their Diamonds is such that some Gems will do anything to avenge their Diamond. In addition to being widely regarded as a tragedy, Pink Diamond's "death" had incited some Gems, notably Jasper and Eyeball, to seek vengeance on her behalf.

Appropriate Behavior
Gems must show absolute respect and loyalty to any Diamond they interact with, whether they serve them or not. Appropriate behaviors include calling the Diamond a Gem serves "my Diamond", saluting a Diamond, and optionally, giving the Diamond many gracious titles before speaking with them.

Symbol
The symbol of the Great Diamond Authority appears on many Gem structures and has changed over time. On structures mostly built before the Rebellion, the symbol consists of four diamond shapes: white (top), yellow (left), blue (right), and pink (bottom). On modern structures, as well as on the partially-healed Centipeetle Mother's drawings that are seen in "Monster Reunion", the Pink Diamond symbol has been removed, leaving only the white, yellow, and blue symbol shapes (now depicted in the form of overlapping triangles; it was also depicted as three diamond shapes in Centipeetle's drawing). In addition to appearing on structures, the redesigned symbol appears on the floor of every modern Gem ship.

Eons Ago
The exact history of the Diamonds is unknown. However, what is known is that the Diamonds are considered the perfect, absolsutely flawless Gems and it can be assumed that this is how they had risen to power. When the Great Diamond Authority was formed, the Diamonds created many rules and constructed Gem society to what it is today. The Diamonds created a hierarchy, stating that some Gems are better and receive more priveleages than others. In order keep this system intact, fusion between two different types of Gems was not allowed. This prevents two or more low class Gems from fusing and becoming a Gem that is higher up in the system. In addition, the Diamonds divided Gems into groups; some belonged to White, some belonged to Yellow, etc. All Gems are required to wear a uniform with a Diamond insignia on it to signify which Diamond they belong to.

The Diamonds also appear to be in charge of different aspects of Homeworld and divided Gems into different groups; Yellow Diamond is in charge of Homeworld's military and Blue Diamond is in charge of diplomacy. Based on the murals in the Moon Base, White Diamond existed first, then Yellow, then Blue, and finally Pink.

According to Garnet, the Diamonds wished to spread their perfection throughout the universe and expand the Gem race into a greater empire. To do this, the Diamonds colonized other worlds, using their resources to create new Gems and outposts. Worlds colonized ranged from planets, moons, and asteroids. When Gems are created on a certain Diamond's planet, they belong to that Diamond. For example, Gems made on a Yellow Diamond colony belong to her.

Eventually, a new Diamond was created: Pink Diamond. The other Diamonds had Pink observe them perform their jobs until they deemed her ready to be in charge of a colony of her own. Pink had begged Yellow and Blue for a colony until they had finally given her Earth. Around the time Earth's colonization began, the Diamonds had colonized 43 planetary bodies and two star systems (according to the Moon Base).

Over 6,000 Years Ago
Pink and her Gems arrived on Earth and began colonizing the planet. When Pink became fascinated by the organic life that lived there, she created a human zoo to preserve human life, and eventually called Yellow and Blue to inform them that the colony could not be completed in an attempt to spare the lives of billions. When the other Diamonds would not listen, Pink created an alter-ego named Rose Quartz through shape-shifting and started the Rebellion alongside her Pearl. Only Pink and Pearl knew that Pink Diamond and Rose Quartz were the same person.

Over 5,750 Years Ago
At Earth's Moon Base, Pink told the other Diamonds once more that they could not colonize Earth, and this time it was because of the Crystal Gems and their rebellion. Blue Diamond became irritated by Pink's excuses and explained that Rose Quartz could not hurt her and that she could not halt the progess of a colony due to a few rebellious Gems. Blue explained that all Pink had to do was smile and wave while her Gems completed the Earth's colonization and the superior forces of Homeworld would make sure that the Crystal Gems were no more.

To help out Pink, Blue sent her court to the Cloud Arena in order to investigate the Crystal Gem rebellion. Among these Gems was Sapphire, who came to Blue and told her that she foresaw the rebels attacking the Cloud Arena, but would be cornered and captured, ending the rebellion. As told, Rose and Pearl attacked Blue Diamond's court, and one of Sapphire's Ruby guards saved her from Pearl, causing them to accidentally fuse into Garnet. Disgusted and distracted by the fusion, Blue Diamond told Ruby that she would be shattered for fusing with a member of her court, allowing the rebels to escape.

Over 5,500 Years Ago
Under her Rose Quartz disguise, Pink Diamond recruited enough Gems to her cause to officially wage a war against Homeworld. Gems were shattered in the ensuing war and the plans of colonizing Earth began to crumble. Pink Diamond was able to keep the Crystal Gems in contention with Homeworld's forces due to her healing abilities.

Over 5,000 Years Ago
Pink Diamond no longer wanted to be apart of the Great Diamond Authority and had believed that the other Diamonds did not care for her. Pink used her abilties to turn ordinary dirt into pink Gem Shards and consumed them. She then had Pearl shape-shift into Rose and "shatter" her with a sword in public, causing everyone (including the other Diamonds) to believe that Rose Quartz had shattered Pink Diamond. When Pink poofed, the shards she had consumed fell to the ground to make the attack more believeable. Now that Pink was presumed dead, she could reform and live the rest of her life as Rose Quartz.

It became clear to Homeworld that Earth was no longer fit to be a colony. Presumably under Yellow Diamond, Gems began collecting the fallen shards of Crystal Gems and experimented with them by forcing them to fuse. After enough experimentation, the Cluster was created and embedded into the Earth's crust to one day destroy the Earth and be used as a planet destroying weapon.

Over 4,500 Years Ago
Homeworld Gems were instructed to evacuate Earth. Out of rage that Pink Diamond was shattered and her colony failed, the Diamonds combined their powers and launched the Corrupting Light at Earth. Both Homeworld and Crystal Gems who were exposed to the light became Corrupted. The Diamonds and Homeworld left Earth and only a few Crystal Gems survived the attack. Now that Pink Diamond was no longer around, the Diamonds divided her Gems amongst themselves; some went to Yellow, some went to Blue, etc.

Due to putting in a lot of their resources into colonizing Earth and not receiving a great enough profit, as well as having some of their technology destroyed in the war, Homeworld's recources began to dwindle. This period of time, that continues on in present day, is known as Era 2. When Era 2 began, Blue Diamond and Pink Diamond's Quartzes made on Earth took over Pink Diamond's Zoo in her memory.

Pink Diamond continued to live on as Rose Quartz with the other Crystal Gems. They continued to protect the Earth and desperately tried to heal the Corrupted Gems. She eventually fell in love with a human named Greg Universe and gave up her physical form to have Steven.

As the years went on, the Diamonds continued colonizing worlds and Pink's "death" had affected each of them. While it is unknown how White Diamond was affected, Blue went into a deep depression and would constantly mourn over Pink, and Yellow tried pushing Pink out of her memory in order to keep herself as a composed leader. Yellow tried having many discussions with Blue about how they should move on from Pink, but Blue never listened.

Season 1
Yellow Diamond wished to know how the Cluster was progessing inside of the Earth. She assigned one of her Peridots to check on the Cluster's status. When Peridot discovered that there were Gems still living on Earth, Yellow Diamond assigned a Jasper to protect her for when she visited the planet.

Season 2
Steven and the Crystal Gems were able to thwart their plans, but Peridot managed to receive the information for Yellow Diamond, acknowledging that the Cluster Gems were emerging as scheduled and the Cluster itself would be emerging shortly to destroy the Earth. Since the Crystal Gems destroyed her ship, Peridot found herself stranded and tried contacted Yellow Diamond through the Communication Hub, but there was never a response. Eventually, Peridot came into contact with the Diamond Communicator and contacted Yellow Diamond that way, allowing herself to talk to her directly.

Peridot reported that the Cluster would emerge shortly which Yellow Diamond found pleasuring. But due to being swayed by the Crystal Gems, Peridot requested that they terminated the Cluster because they would be sacrificing all of the Earth's rich resources for one weapon. Peridot reports that she devised a planet to use the Earth's resources without disrupting the organic life but Yellow Diamond does not care to hear her out. Because of this, Peridot insults Yellow Diamond and pledges herself to the Crystal Gems. After the call hangs up, Yellow Diamond attempts to destroy Peridot by denotating the communicator.

Season 4
Blue Diamond visits Earth, specifically at the location where Pink Diamond was allegedly shattered, believing it is the last time she will get to visit the planet before the Cluster destroys it. Steven tracks down Blue Diamond's location with Greg when he begins having dreams where he sees through her eyes and cries her tears. When they arrive, Greg reveals himself to Blue Pearl, who takes him to Blue Diamond. While crying, Blue Diamond explains her confusion that a fragile race such as humans could thrive on Earth, but on the same world, a Diamond could be shattered. Greg offers Blue his condolences and explains that he also lost someone and understands how she feels (the two don't realize they are mourning over the same person). Touched by Greg's sympathy, Blue Diamond kidnaps him to take him to Pink Diamond's Zoo, believing that she is sparing him from the Cluster.

At the Zoo, Blue Diamond enters Pink's room and begins crying. Yellow comes in and is visibly annoyed, She tells Blue that she should shatter all of Pink's Rose Quartzes becaue she was shattered by a Rose Quartz, but Blue wishes to preserve all of Pink's Gems and her legacy as a whole. Yellow Diamond, her Pearl, and Blue Pearl sing in an attempt to make Blue feel better. They tell Blue that for the good of the Gem Empire, Blue has to move on and become a strong leader instead of moping around all of time. When the Crystal Gems came to infiltrate the Zoo in order to save Greg, they told the Gems working there that they were dropping off Steven for the Zoo as a special delivery for Blue Diamond. The administrator of the Zoo, Holly Blue Agate, brought Sapphire to Blue Diamond and told her that she forsaw her wanting more humans for the Zoo. Blue Diamond believes Sapphire, saying that the window to preserve the Earth's inhabitants is closing due to the Cluster. Yellow realizes that is what Blue wants, and when she discovers that the Cluster hasn't emerged yet, she tells Blue that there is still more time to collect humans.

When Peridot first discovered that there were Crystal Gems still on Earth, Steven listed off some of his human friends which Peridot reported to Yellow Diamond. Using this list, Yellow and Blue sent two elite Gems to Earth, Topaz and Aquamarine, to retrieve them. In order to save his friends, Steven turns himself in as Rose Quartz, the Gem that shattered Pink Diamond.

Season 5
Topaz and Aquamarine takes Steven to Homeworld where he is put on trial in front of Yellow and Blue for the murder of Pink. Yellow wishes to just get the trial over with so Steven could be shattered, but Blue wants to hear him out. Steven tries to explain what happened, even though he has no idea, which only makes Blue upset when he gets facts wrong. Steven's lawyer explains that witnesses said Pink had stepped out of her palanquin when Rose attacked her from the front, but that does not make any sense because Rose Quartz wouldn't be able to get past all of Pink's guards. She states that only someone of supreme authority could meet with Pink personally, and blames Pink's murder on one of the Diamonds. Furious, Yellow poofs both of the Zircons. Blue yells at Yellow, asking her to restrain herself. While they are distracted, Steven escapes on Blue Diamond's palanquin, and Yellow warns her that he is on their world now. Once Steven is safe, Yellow sends Shattering Robonoids to find and execute him.

Yellow Diamond
Yellow Diamond is one of the Diamond matriarchs. She is the former superior of Peridot, and also the current superior to countless other Gems made for her. She commenced the Cluster project to acquire it as a geo-weapon after the Earth was deemed unfit to be a colony due to the rise of the Crystal Gems.

According to Peridot in "Hit the Diamond", Yellow Diamond is responsible for Homeworld's military.

Almost all of her subordinates (except her Pearl, "Doc" and "Navy") have a small yellow diamond insignia on their chests in two symmetrically connecting diagonal black lines.

Subordinates

 * Yellow Pearl
 * Topaz
 * Jasper (originally Pink Diamond's subordinate)
 * Prosecuting Zircon
 * Emerald
 * Nephrites
 * Nephrite-XJ Cut-763
 * Hessonite (Save the Light)
 * Squaridot (Save the Light)
 * Rubies
 * Ruby (Doc)
 * Ruby (Eyeball)
 * Ruby (Army)
 * Ruby (Navy)
 * Ruby (Leggy)

Past Subordinates

 * Peridot

Colonies

 * Jungle Moon's planet
 * Multiple Asteroid Mines
 * 2 star systems and 18 unknown planetary bodies in total (by the time of Earth's colonization)

Blue Diamond
One of the Diamond matriarchs. She was the superior of Ruby and Sapphire, and many other Gems made for her. Her subordinates used to have a large blue diamond on their bodies, but now they have a similar design to Yellow Diamond's subordinates, with a small light Blue Diamond insignia on their chests in two symmetrically connecting diagonal dark lines.

According to Rebecca Sugar, blue-colored Gems are oriented towards diplomatic roles.

Subordinates

 * Blue Pearl
 * Holly Blue Agate
 * Aquamarine
 * Emerald
 * Unknown court members
 * Other Rubies
 * Several former subordinates of Pink Diamond
 * Amethysts
 * Jaspers
 * Carnelian
 * Defending Zircon (alignment unknown)

Past Subordinates

 * Sapphire
 * Ruby
 * Lapis Lazuli

Colonies

 * 9 unknown planetary bodies (by the time of Earth's colonization)

White Diamond
One of the Diamond leaders. Details about her are unknown except her white symbol that appears alongside those representing Blue Diamond and Yellow Diamond on both ancient and modern Gem structures. Her name and only acknowledgment so far was stated in the book Steven Universe: Art & Origins.

Colonies

 * 28 planetary bodies (by the time of Earth's colonization)

Pink Diamond
Pink Diamond was a former member of the Great Diamond Authority. When she was a recently created Gem, she begged the other Diamonds for a colony until she was finally given one, the Earth. Once the colonization of Earth began, Pink became fascinated by the organic life that lived on the planet. In an attempt to preserve human life, she created the human zoo, and later decided that she did not want to go through with completing the colony. Pink came up with multiple excuses to the other Diamonds as to why they could not continue colonizing Earth, but they would not listen. Eventually, Pink created an alter-ego named Rose Quartz by shape-shifting. As Rose, Pink and her Pearl rallied up enough Gems who felt how she felt, and started the Rebellion.

As Rose, Pink and her fellow rebels would fight for Earth's freedom, and then Pink would shape-shift back and continue being a Diamond. Pink then used the Crystal Gems as another excuse to why they couldn't colonize Earth, but the other Diamonds still would not listen. She eventually decided that she wanted to leave her life as a Diamond behind and live as Rose Quartz forever on Earth with the Crystal Gems and humans. Pink Diamond crushed dirt and turned it into pink shards which she then ate. She then had Pearl shape-shift into Rose Quartz and then poof her in public, leaving shards behind. Everyone who witnessed the event believed that Rose Quartz shattered Pink Diamond, and only Pink and her Pearl knew the truth. Pink then reformed as Rose Quartz and led the Crystal Gems to victory.

Pink Diamond's "death" has affected Gems in many different ways. Some Gems, like the Diamonds, and those who served her, like Jasper and Eyeball, continue to mourn her and show animosity towards Rose, not knowing they are the same person. Others, like the defending Zircon, try to make sense of what happened to Pink. Blue Zircon states "so how did a Rose Quartz, with no business being anywhere near Pink Diamond, get so close in the first place? Where were Pink Diamond's attendants? Her Agates, Her Sapphires? And where was her Pearl?".

Past Subordinates

 * Pink Diamond's Gems
 * Pearl
 * Bubbled Rose Quartzes
 * Unknown Quartzes
 * Amethysts
 * Jaspers
 * Jasper
 * Skinny
 * Carnelian
 * Sapphires
 * Agates

Past Colony

 * Earth

Many Era 2 Gems appear to be largely unaware of the Rebellion, evidenced by Peridot's ignorance of the Crystal Gems in "Marble Madness". This suggests that events about Pink Diamond's death are not frequently discussed, which may be indicative of the devotion and respect Gems have for the Diamonds.

Trivia

 * The confirmed instrument of the diamonds is a synthetic sound combining harmonette and strings, processed by a synth, this can also be heard in "Same Old World" and "Monster Reunion" when the Corrupting Light flashes. It was revealed in the Steven Universe: Art & Origins book that each Diamond also has a unique chord.
 * The current symbol might be a reference to the Triforce symbol from The Legend of Zelda, as they both are three connecting triangles that form a symbol. It also bears a resemblance to the Mitsu uroko emblem of the Hōjō clan.
 * The former symbol resembles the NFPA 704 diamond symbol, with slightly different colors (one of the diamonds is red instead of pink) and with the colors' positions switched.
 * The former symbol's order of colors seems to represent the location of the gem in the body of its owner: both Blue and Yellow Diamond have their gem in their chests, so they are equal in position in the middle row, whereas White Diamond has her gem in her forehead and Pink Diamond has it in the lowest position in her navel, hence in the symbol White Diamond is on the top and Pink Diamond is on the bottom.
 * It also reflects the size of the Diamonds, as White Diamond is the largest, Pink Diamond is the smallest, and both Yellow and Blue Diamond are equal in size.
 * The Great Diamond Authority is yet another of Ronaldo's paranormal theories that have been proven to be true.
 * He began to develop his theory in the first season episode "Keep Beach City Weird", warning of the Great Diamond Authority. Peridot confirmed the matriarchs' collective name in the episode "It Could've Been Great".
 * It is revealed in "Monster Reunion" that the Diamonds were the ones responsible for the corruption of almost all remaining Gems on Earth.
 * Centipeetle drew the original Great Diamond Authority symbol without the lowermost diamond when she was asked who or what caused the damage to her and the other Corrupted Gems, implying Pink Diamond was not involved with this attack. This is confirmed in "Your Mother and Mine".
 * The circles placed behind the heads of the Diamonds in their murals resemble halos, a common motif in the sacred art of Ancient Greece, Ancient Rome, Hinduism, Buddhism, Islam, and Christianity. Combined with the epithets the prosecuting Zircon uses for Yellow Diamond, it appears light is extremely relevant in their iconography.
 * So far, White Diamond is the only Diamond that has not been mentioned by the characters in the entire series, being only depicted in an indirect way.
 * Although Gems usually serve under a specific diamond, Blue and Yellow Diamond seem to have the same amount of authority over each other's subordinates. For example, Yellow Diamond tells Holly Blue to "Get to the point!" in "That Will Be All", she also poofs Blue Diamond's defending Zircon in "The Trial" and Emerald's uniform shows both Yellow and Blue Diamond insignias in "Lars of the Stars".

Gallery
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