Blue Diamond

Blue Diamond is a former member of The Great Diamond Authority and used to rule over the diplomatic factions of Homeworld, she now is an ally to the Crystal Gems and is an emotional healer and therapist.

## Fusions

* When fused with Blue Pearl, they form Aqua Aura Quartz.

* When fused with White Diamond, they form Ice Diamond.

* When fused with Pink Diamond, they form Lavender Diamond.

* When fused with Yellow Diamond, they form Green Diamond.

* When fused with Spinel, they form Purple Morganite.

* When fused with White Diamond and Pink Diamond, they form Harlequin Diamond.

* When fused with White Diamond and Yellow Diamond, they form Chimera Diamond.

* When fused with Yellow Diamond and Pink Diamond, they form Ebony Diamond.

* When fused with Ruby and Sapphire, they form Moonstone.

* When fused with White Diamond, Yellow Diamond and Pink Diamond, they form Paragon.

* When fused with Ruby, Sapphire, Amethyst and Pearl, they form Purple Sheen Obsidian.

## Abilities

### Unique Abilities

* **Aura Projection**: The Diamonds can project an aura around them that they can control; they can either radiate it from their entire bodies or emit it from specific parts of their bodies (i.e., their hands). Blue's aura is blue and has water-like properties (evident by allowing her to make gems cry). Though intangible, Blue was able to break Lapis' water chains from her hands upon coating her hands with her aura. She can use this as an offensive ability in both the physical and mental plane, as seen when she was able to focus her aura and attack Steven as he was astral projecting.
	+ **Sadness Inducement**: Blue Diamond can engulf a large area with her aura, causing any Gem or Half-Gem within its reach to be overwhelmed with intense feelings of sadness and cry uncontrollably, even affecting Yellow Diamond to a limited degree. Blue Diamond seems to activate this ability involuntary whenever she is shedding tears in an emotional state (e.g. joy or nostalgia), albeit to a lesser degree since she doesn't radiate her blue aura during these instances. When she weaponized her grief over Pink Diamond's supposed death, she instantly rendered the Crystal Gems unable to fight, also splitting all but the most stable Gem fusions that got caught in her aura apart, as Alexandrite came undone as soon as she was affected, while Garnet remained whole. The level of resistance to the ability varies, specifically regarding non-Gems: after being engulfed by Blue's aura, Connie did kneel in tears with the rest of the Gems, despite her not being affected by it the first time (she's also immune to it in the following episode); Lion was apparently impervious to its effects, but whether this was due to his revival by Rose Quartz is unknown; Lapis Lazuli, having undergone extreme emotional trauma, was seen resisting the aura's effect and barely shed a tear upon being affected.
	+ **Corruption Induction**: Though the attack was meant to obliterate the Crystal Gems on Earth after Pink's supposed shattering, Blue, Yellow, and White Diamond's collective powers instead corrupted the remaining Gems on Earth.
		- **Corruption Reversal**: Along with Pink/Steven, White, and Yellow Diamond, Blue Diamond has the ability to reverse the effects of the Corrupting Light on Gems. However, it is implied that this is only temporary without the power of all four Diamonds. The four reversed the corruption on the water of Rose's Fountain in "Change Your Mind".
	+ **Psychic Resistance**: Blue Diamond's aura shields her from telepathic abilities through the sheer intensity of her thoughts, even without her own awareness. This includes Steven's (and to extension Pink Diamond's) astral projection, as seen when she briefly repelled Steven, though this resistance doesn't extend to White Diamond's mind control.
		- **Psychic Blast**: While on the mental plane, Blue Diamond can fire her aura as a beam which induces profound distress on the target; however, despite combining her assault with Yellow Diamond's, it was repelled by Steven's own aura.
		- **Psychic Detection**: Blue Diamond is also able to locate others on the mental plane when they aren't in physical contact with her, such as Steven.
* **Energy Projection:** Blue Diamond is shown to have some form of energy projection power that she uses for battle. The energy can be molded into different projectiles, from spheres to a hail of lasers, or combinations thereof. Once Blue Diamond broke free of Lapis water chains, she was able to create a ball of stellar light and it was able to shoot out blasts and explosions. She was able to form large spheres of energy dense enough to physically push back Yellow Diamond and summon one powerful enough to cause Yellow Diamond to cry in pain after being struck with it.
* **Cloud Generation:** In "Homeworld Bound", Blue Diamond is shown to be able to create clouds from, according to herself, her evaporated tears. Gems are able to ride these clouds.
	+ **Joy Inducement:** When a Gem touches a cloud, they feel joy, which resembles the opposite of Blue's crying inducement. Blue uses them to try to help Steven feel better, though she is ultimately unsuccessful.
* **Water-Walking**: In "I Am My Monster", along with Yellow Diamond and White Diamond, Blue can run or walk on the surface of water.

### Skillset

* **Spaceship Piloting**: Blue Diamond has a spaceship only she is capable of controlling with her left hand, until it was repaired by Bismuth, Peridot, and Lapis Lazuli. She is able to use the ship in combat.

## Gallery

Blue Diamond's Original Form.Blue Diamond when controlled by White Diamond.