Houseki no Kuni Wiki
Advertisement


Diamond (ダイヤモンド, Daiyamondo), also called Dia, is one of the Gems who mainly does patrol duty. Despite their high offensive power, their toughness is second rate and they're easily broken. The other Gems consider them lovely and a top fashion model.

Appearance[]

Diamond has a clear, colorless scheme, yet their gem's characteristically high refractive index causes the light that hits them to refract strongly, creating a rainbow effect. They are very sparkly and blinding, glowing even during the night, though they seem to be able to dampen this by covering parts of their body up. Their hair is a fluffy short-medium bob, with thick eyebrows and eyelashes. They wore either a winter or summer uniform depending on the season. They also wore standard black loafers with small bows. As a diamond, they always wore white opera gloves with white thigh-highs.

Manga Spoiler


On the Moon, they wear feminine and frilly outfits that often resemble dresses with puffy skirts.

During the Invasion Arc, the back of their head had a huge bow, they wore a light halterneck leotard with vertical stripes, they also wore a huge flower-shaped skirt and wore pointed toe boots with high heels and wore opera gloves. They wielded a sword as a weapon that was tough enough to break Bort.

As of Chapter 95, Diamond has become a Lunarian and therefore has lost their unique rainbow-reflective translucent physique. Although the effect might still be similar, as lunarian bodies also reflect various different colors at once.

End of spoiler.

Personality[]

Diamond is initially very friendly, kind, and gentle. They appear to be relatively calm during battle, even when their situation isn't good. However, they are actually insecure and frustrated with their current body which, though being the hardest, shatters easily. Dia wishes to change this. Dia dislikes being compared to Bort although they admire their younger sibling a lot.

They are perceptive regarding Gems' inner feelings and relationships, though Cinnabar accuses them of seeing everything as some kind of romance. Despite their more gentle nature, they're very stubborn and tend to fight until they shatter in battle. From Bort's point of view, Dia is extremely reckless.

Diamond's contempt towards of Bort reaches a head in later chapters when Dia forces them into fighting, furious that the gem would not only show a softer side to someone else, but also abandon the one thing that they were so much better at. It's here that Diamond shows that they've gotten egotistical on the moon, ordering their fans to cheer and belittling them for not being good enough.

Character Profiles[]

Vol. 2:

  • Wants to be like Bort. Loves to talk about love.

Vol. 3:

  • Cute representative. Top model.

Vol. 4:

  • Adorable. Just strong enough.

Vol. 5:

  • Cuties love cute things.

Vol. 6:

  • Very cute and relatively strong. Idol of all the gems.

Vol. 7:

  • Likes cute and pretty things.

Vol. 8:

  • Adorable. But still has worries.

Vol. 9:

  • Adorable. Adapts easily to new environments.

Vol. 10:

  • Likes it on the moon, where there are all kinds of love stories.

Vol. 11:

  • Appears to have found and ideal self.

Story[]

  • Phosphophyllite asked Diamond advice for performing better in their work, and they suggest to Phos to change what they normally do. When fighting the Lunarians, they broke their arm while trying out a new technique and threw Phos far so they could run away. Bort saved them both later and reprimanded Dia. Dia and Bort then fought the mysterious shell slug the Lunarians threw, and broke its shell.
  • Diamond mistook the slug as Phos and began looking a way to bring Phos back. Cinnabar gave them an idea and later Dia asks the Gems to pull out the shell from pond and collect Phos' fragments.
  • Dia searched for Phos in their room only to find out that Phos had placed a doll in their bed. Later they told the rest of the Gems and joined the search in the sea.
  • They joined the winter hibernation like the other Gems.
  • Phos told Dia about they became Bort's new teammate. They seemed shocked but then agreed.
  • Diamond fought the anomalous Moon Person "Shiro" and defeated it for the first time despite losing much of their body to breakage. They became sad after that because they didn't have the chance to see the fluffy Lunarian so Red Beryl made a "Shiro" doll and gave it to them.
  • When three sunspots were spotted together at the same time, Diamond, Yellow Diamond, and Benitoite handled one together. Benitoite accidentally struck the vessel after one of the arrows bounces off their sword.
  • One of the gems who accompanied Phosphophyllite to the moon.
  • Has found their true passion of becoming a pop star on the moon.
  • Was present for Phos's return to the Moon after 220 years. Is threatened by Phos to come and destroy the Earth Gems and complies. On Earth, Dia forces Bort to fight against them. The fight ends in a draw, with both Gems shattering each other.
  • Diamond is restored like all the other Gems and is changed into a Lunarian.
  • After the completion of Phos' divine conversion, they were present alongside all other Lunarians on their final trip back to the Earth, and were then prayed away by Phos into nothingness along with every remnants of humanity.

Relationships[]

Phosphophyllite[]

Diamond seems to spoil Phosphophyllite. They listen to them patiently and cares for them when they're sulking. When their blade was thrown and their arm broken, Diamond threw Phos and told them to run. It seemed because Phos tried to save Diamond's arm and got eaten, Diamond decided to look for a way to bring Phos back. When they heard that Phos' plea to go to ocean got rejected, Dia planned to persuade Sensei again together with Phos. Dia also accepted and was very understanding about Bort and Phos being teammates, and asked Phos to take care of the little one (Bort), though later they said it was so frustrating (for them). Though Dia thinks Bort is eccentric, they became upset when Phos talked badly about Bort. Along with most other gems, Dia's concern for Phos diminished after going to the moon, most likely because of their satisfaction with their new status as a pop idol.

Bort[]

Diamond's younger sibling. Their relationship with Bort is complicated. They admire and love Bort, but also envy and resent them for being so strong and otherwise undermining Dia's strength and honor as a diamond. Bort themself thinks of Diamond's insecurities as irrelevant and often physically berates and yells at them for their reckless and inefficient battle style, but Diamond is too stubborn to listen to them even though they know Bort is right. They tell Phos that Bort is the real diamond between them. Bort sometimes calls Diamond 'Niichan', while Diamond calls Bort their 'Otouto'. Dia want to somehow get rid of or leave Bort so that they don't feel so inferior.

The other gems know about Bort and Diamond's strength situation and try not mention it in front of Diamond.

When separated from Bort on the Moon, Dia seems to display fear at the mention of Bort, signifying that there was more hostility in treatment from Bort towards Dia and Dia's feelings towards Bort. Phos eventually uses this to take advantage of Dia in threatening to bring Bort to the Moon so that Dia complies in assisting with destroying the Earth Gems. Dia mentions that they would like to turn that "little nuisance (Bort) into dust". Invading Earth proper, Diamond is immediately angry at Bort for their unwillingness to fight and their kindness towards Cinnabar. When they're able to shatter them, Diamond is darkly satisfied with their pyrrhic victory even as they fall to pieces.

After both of them were changed into Lunarians, Diamond was seen seemingly trying to reconcile with the now-despondent jellyfish breeder Bort, barging in and announcing that all the former diamonds will be reconvening at the upcoming party - to which Bort bluntly denied. It could be implied that Dia no longer has a reason to fear or envy Bort, now that their status is pretty much equal (or even higher, considering Dia's current profession as a performer.)

Cinnabar[]

Maybe because they were 'born' in the same year, Dia is more friendly to Cinnabar and wasn't afraid being near them. They can read between the lines of what Cinnabar says, much to their annoyance. Diamond says that Cinnabar talks about Phos more than they talked during the last century. They also like to tease them about their 'crush' on Phos.

Yellow Diamond[]

Older sibling to all the gems, but to Diamond especially due to their shared gem type. Dia looks up to Yellow like the other gems and was partnered with them for a short while. They got along very well while the two were partnered. Diamond doesn't seem to harbor an inferiority complex about Yellow, even with their super speed. Save for their shared diamond-class, Yellow Diamond isn't particularly close to Dia.

Morganite[]

Morganite and Phosphophyllite once played card games against Diamond and Euclase, calling them 'Team Eyebrows'. Morga was also one of the gems Dia asked for help in regards to 'Phos' turning into a slug.

Euclase[]

Euclase and Diamond played a game of cards against Morganite and Phosphophyllite. They won every time.

Gem Info[]

  • Mineral: Diamond
  • Chemistry: C
  • Color: Colorless

Diamond (from the ancient Greek ἀδάμας – adámas, meaning "unbreakable", "proper", or "unalterable") is one of the best-known and most sought-after gemstones. Diamond is the only gem made of a single element: It is typically about 99.95 percent carbon. The other 0.05 percent can include one or more trace elements, which are atoms that aren't part of the diamond’s essential chemistry. Some trace elements can influence its color or crystal shape. The hardness of diamond and its high dispersion of light – giving the diamond its characteristic "fire" – make it useful for industrial applications and desirable as jewelry.

It forms under high temperature and pressure conditions that exist only within a specific depth range (about 100 miles) beneath the earth’s surface. Diamond’s crystal structure is isometric, which means the carbon atoms are bonded in essentially the same way in all directions.

Perhaps the most famous use of the diamond in jewelry is in engagement rings, which became popular in the early to mid 20th century due to an advertising campaign by the De Beers company, though diamond rings have been used to symbolize engagements since at least the 15th century. Diamond is the birthstone for April, Especially queenly Cut diamonds are Popular as April Birthstone. Colorless diamond is also the gem that marks the 60th and 75th wedding anniversaries. 

Source: Wikipedia | GIA

Trivia[]

  • Diamonds have been used decoratively throughout history. In modern times, it is often associated as a gem used in weddings or marriage. This can be seen reflected in the series with Dia's own sweet and romance-loving personality.
  • Diamond is one of the few gems with a custom part of their uniform.
  • In real life, diamond is said to be the hardest natural material on Earth. This can be compared to the character's own obstinate trait in some ways.
  • There are many types of diamonds in real life. This is also reflected in the series with the various diamond-class characters, including Yellow Diamond and Bort.
  • The hardest known type is known as Aggregated Diamond Nanorods (ADNR), which is 11% harder than bulk diamond. This type of diamond is also known to be naturally generated, rarely found in meteor impacts with graphite.

Gallery[]

Characters
Gems
KongoPhosphophylliteMorganiteGosheniteRutileRed BerylBenitoiteCinnabarJadeDiamondBortEuclaseNeptuniteYellow DiamondZirconObsidianAmethyst 84Amethyst 33AlexandriteAntarcticitePadparadschaGhost QuartzCairngormWatermelon TourmalineSpheneHemimorphitePeridot • Unknown 28th Gem/s
Morganite (New)Goshenite (New)
HeliodorGreen DiamondRubySapphirePink TopazPink FluoriteLapis LazuliTopazChrysoberylBlue ZoisiteAquamarineApophylliteRed DiamondFluoriteSphaleriteEmerald
Lunarians
AechmeaBarbataCicadaQuietaKimaShiroLadraBee
Admirabilis
VentricosusAculeatusVariegatusConvallarius
Others
PebbleKongo's Brother


Dia
Advertisement