Blue Diamond
Blue diamond s mural by gustavothehuman-daqy387
  • Blue (Other diamonds)
  • BD
  • My Diamond (Followers/Court Members)



Homeworld Homewolder


FemaleIcon Female




20 ft


Off white


Light blue

Gem Type



Blue Diamond



Professional Status

The Great Diamond Authority

  • Matriarch

Homeworld Gem

Personal Status


Relationship Status

Single (She ain't looking for anything)


Crystal Gems

Lives on


Lives in

Her Palace





Steven Universe Soundtrack ♫ - Blue Diamond

Steven Universe Soundtrack ♫ - Blue Diamond

Played by


Blue Diamond is a Homeworld Gem who is part of the Diamond Authority, the matriarchs of Homeworld that rule over Gemkind. Usually accompanied by Blue Pearl, Blue Diamond's gemstone is a blue diamond embedded on her chest. She was once the supervisor of the colonization of Earth before abandoning it after the Crystal Gems' rebellion.


Blue Diamond - as one of the rulers of Homeworld - is of a massive size, standing at around 20 feet. She has a turquoise complexion and off-white hair that extends past her neck. She has plump lips and a straight nose. She has black eyebrows, and three black markings on the lower portion of her eyes, which are turquoise with diamond shaped pupils. She is usually seen wearing a large, dark blue cloak that obscures her face. Her gemstone is located on her chest.


Canon Info

Background Information

Blue Diamond is portrayed as the most mellow and calm of the Diamonds, treating high-ranking members of her court with utmost respect. She has a reputation of being merciful and forgiving, evident by her desire to hang onto Pink Diamond's legacy. However, similar to Yellow Diamond, she has a dark side to her, as she isn't hesitant to shatter any Gem who she sees as failed.


Like all Gems, Blue Diamond has the ability to invoke a weapon, fuse, change shape, strength and skill beyond human battle, and retreat to her gem after being wounded to heal. Being a diamond, she is incredibly powerful, capable on shattering a gem in an instant. She very seldomly fights however, as she usually has the members of her court fight for her

Unique Abilities

  • Radiated Pathokinesis: When Blue Diamond is overwhelmed with emotions, she emits a blue aura around her that induces the said emotion to anyone exposed to it. The induction is powerful enough to cause Gems exposed to the aura to cry immediately unprovoked, even affecting Yellow Diamond to a small degree. The ability does not seem to affect non-Gem beings, as Lars was not affected by it. It, however, does affect Steven, a half-Gem. It's unknown if this is limited to her sadness or if she can manipulate Gems with different emotions.


Yellow Diamond

Yellow Diamond is an ally of Blue Diamond. Though she gets annoyed or irritated with Yellow Diamond from time-to-time, she cares deeply for her as they have a relationship similar to that of two sisters.

White Diamond

Despite the fact that they've had some disagreements in the past, Blue Diamond is fond of White Diamond and thinks of her as an ally. Recently, she's been helping White Diamond to try and restore Pink Diamond's former district.

Pink Diamond

Even though she's been gone for 1,000s of years, Blue Diamond still misses her and has yet to get past her death. She even visits the human zoo - a place former taken care of by Pink Diamond herself - on a regular basis.



A cut blue diamond.

Gemstone Information
  • Diamond is the official modern birthstone for April, and it is also used as an official sixty-year anniversary gemstone.
  • Diamonds are the stone of truth and victory.
    • It is associated with lightning and fearlessness, and for its properties of protection.
    • The diamond, in its rarity and beauty, is a symbol of purity and innocence, love, and fidelity, and embraces the strength of character, ethics, and faithfulness to oneself and others.
  • Diamond is the transparent, gemstone-quality crystalline form of carbon and it is indeed one of the hardest known natural substances on Earth.
    • Diamonds' hardness is the result of adamant chemical bonds between the carbon atoms.
    • There is no other gemstone in the same family as diamond, although there are a variety of very similar gemstones.
    • Diamond is pure carbon and is chemically the same as graphite.
    • Diamond is a p-type semiconductor.
  • Although traditional colorless or "white diamonds" are by far the most popular colored diamonds, yellow and brown diamonds are actually the most commonly occurring diamonds.
    • Other diamond colors include pink, red, orange, yellow, green, gray, and black.
    • Specific colors will trade under specific names; brown and yellow diamonds are often referred to as "champagne" or "cognac" diamonds.
    • If a diamond's impurities consist of boron and low level of nitrogen, the diamond will be a blue or gray color (Type IIb). Other blue diamonds are unrelated to boron; nickel or high concentrations of hydrogen are the hypothetical causes of blue color in some diamonds.
  • Diamond deposits are found worldwide, the most notable being Africa, Australia, and India.
    • Approximately half of the world's diamonds come from Central and Southern Africa.
    • Canada has recently become a main commercial source for fine white diamonds.
  • One of the most famous diamonds, the Hope Diamond, is a blue diamond, and is one of the largest diamonds ever to be cut and faceted. It is known notoriously for supposedly being cursed, depicted to bring forth misfortune to whoever attempts to wear it.


Image Description
Blue Diamond's gemstone
Blue Diamond's gemstone is located on her chest, featuring a diamond-shaped facet, and a diamond shape overall.
ve Gems
Quartzes Banded AmethystCloudy AmethystDark Violet AmethystSwirls
Sapphires PaddyViolet Sapphire
Rubies Six
Diamonds White DiamondYellow DiamondBlue Diamond
Pearls Sea Salt Pearl
Topazes Blue Topaz
Fusions Ayanite FusionCrimson SapphireSky Blue Opal
Corals CoralHomeworld Coral
Bismuths Confederate BismuthPink BismuthRainbow Bismuth
Ayanites AyaniteEmo AyaniteCat AyaniteAyaprotexy
Kyanites KyaniteKyara
Other ApoteryxBlack HiddeniteBlue ObsidianCacoxenite


ve Diamonds

Yellow Diamond navbox Blue Diamond navbox White Diamond navbox